This page has only limited features, please log in for full access.

Dr. Xiaohui Chen
School of Mechanical and Electrical Engineering, Xinyu University, Xinyu

Basic Info


Research Keywords & Expertise

0 Coatings
0 Surface Modification
0 Engineering Application
0 Light alloys
0 Metal-matrix composites

Fingerprints

Metal-matrix composites
Surface Modification

Honors and Awards

The user has no records in this section


Career Timeline

The user has no records in this section.


Short Biography

The user biography is not available.
Following
Followers
Co Authors
The list of users this user is following is empty.
Following: 0 users

Feed

Journal article
Published: 17 March 2021 in Mechanics & Industry
Reads 0
Downloads 0

In this paper, local-thickened plates are adopted for aluminum alloy square cups stamping with relatively low values of residual stresses and small radius at the bottom corner. By utilizing numerical and experimental methods, the effects of process parameters and plate local thickening on the residual stress distribution of hot stamped aluminum alloy square cups are studied. Furthermore, the influence of plate local thickening on the radius of bottom corner of square cups is also investigated. The results showed that with an increase in the forming temperature, blank holder force and die corner radius, residual stresses in hot stamped square cups can be reduced. The same effect can be achieved by decreasing the die entrance radius. As opposed to the flat plates, using local-thickened plates can not only reduce the residual stresses values in hot stamped square cups, but also decrease the radius at the bottom corner of square cups. When the optimized thickening scheme of plate is used, the smaller radius at the bottom corner, the lower residual stresses in the square cups are obtained.

ACS Style

Jinbo Li; Xiaohui Chen; Xianlong Liu. Investigation of process parameters and plate local thickening on residual stresses in hot stamping process. Mechanics & Industry 2021, 22, 18 .

AMA Style

Jinbo Li, Xiaohui Chen, Xianlong Liu. Investigation of process parameters and plate local thickening on residual stresses in hot stamping process. Mechanics & Industry. 2021; 22 ():18.

Chicago/Turabian Style

Jinbo Li; Xiaohui Chen; Xianlong Liu. 2021. "Investigation of process parameters and plate local thickening on residual stresses in hot stamping process." Mechanics & Industry 22, no. : 18.

Research article
Published: 26 December 2020 in International Journal of Cast Metals Research
Reads 0
Downloads 0

The composite components with complex-shape and containing different nanoparticle contents and sizes were successfully produced by the short-process thixoforming. Based on the developed constitutive model, numerical simulation of thixoforming for the composites with a high solid fraction was carried out, and the relevant experiments were performed. The influences of temperature and forming rate on strain-stress were analysed. Furthermore, the effects of temperature, moving rate of the die and holding time on the filling behaviour were discussed. Results of numerical simulation revealed that at high temperature and high forming rate, uniformly distributed stress-strain field and reduced maximum forming force could be obtained, which is advantageous for avoiding the non-uniform composition and incomplete filling caused by liquid-phase segregation; they were consistent with experimental results. After T6 heat treatment, the average yield strength and ultimate tensile strength of the parts were significantly improved. Moreover, the fracture mechanism of the part was discussed.

ACS Style

Xiao-Hui Chen; Guiwu Liu; Ping Chen; Lei Liu; Senlin Rao; Yong Hu. Short-process thixoforming of nano-particles reinforced aluminium matrix composites with a high solid fraction. International Journal of Cast Metals Research 2020, 34, 21 -31.

AMA Style

Xiao-Hui Chen, Guiwu Liu, Ping Chen, Lei Liu, Senlin Rao, Yong Hu. Short-process thixoforming of nano-particles reinforced aluminium matrix composites with a high solid fraction. International Journal of Cast Metals Research. 2020; 34 (1):21-31.

Chicago/Turabian Style

Xiao-Hui Chen; Guiwu Liu; Ping Chen; Lei Liu; Senlin Rao; Yong Hu. 2020. "Short-process thixoforming of nano-particles reinforced aluminium matrix composites with a high solid fraction." International Journal of Cast Metals Research 34, no. 1: 21-31.

Journal article
Published: 28 October 2020 in Coatings
Reads 0
Downloads 0

Composites reinforced by nano-ceramic particles typically result in the formation of clustering and a weak interface. The spatial distribution of particles and the wetting behavior remarkably affect the targeted properties. Here, a surface modification combined spatial control solution was demonstrated to prepare nanocomposites with homogeneous micro-structures. Poly-crystalline nano-MgAl2O4 particles that possess a good crystallographic orientation relationship with Al were coated on the surface of ceramic particles, and they were macro- and then microscopically dispersed in the melt by ultrasonic vibration with variable frequency. The reason this is that the acoustic pressure distributed in the Al melt can induce the acoustic streaming and cavitation. A model for calculating equilibrium particle migration velocity was proposed, based on which the distribution of particles could be controlled by adjusting the solidification rate and the size of particle clustering. The experimental results were validated by the prediction of the model. In addition, it was found that the relationship of the maximum radius angle with the contact angle was w0 = 180° - θ, and ultrasonic vibration could provide enough energy for the later stage entering of particles to overcome the energy barrier.

ACS Style

Xiao-Hui Chen; Chuncai Xiao; Jinbo Li. Preparation of MgAl2O4-Coated Al2O3np and Migration of Ceramic Nanoparticles during Ultrasonic Processing of Aluminum Matrix Composites. Coatings 2020, 10, 1039 .

AMA Style

Xiao-Hui Chen, Chuncai Xiao, Jinbo Li. Preparation of MgAl2O4-Coated Al2O3np and Migration of Ceramic Nanoparticles during Ultrasonic Processing of Aluminum Matrix Composites. Coatings. 2020; 10 (11):1039.

Chicago/Turabian Style

Xiao-Hui Chen; Chuncai Xiao; Jinbo Li. 2020. "Preparation of MgAl2O4-Coated Al2O3np and Migration of Ceramic Nanoparticles during Ultrasonic Processing of Aluminum Matrix Composites." Coatings 10, no. 11: 1039.

Journal article
Published: 21 September 2020 in Coatings
Reads 0
Downloads 0

The wettability of the metal/SiC system is not always excellent, resulting in the limitation of the widespread use of SiC ceramic. In this paper, three implantation doses of Si ions (5 × 1015, 1 × 1016, 5 × 1016 ions/cm2) were implanted into the 6H-SiC substrate. The wetting of Cu-(2.5, 5, 7.5, 10) Sn alloys on the pristine and Si-SiC were studied by the sessile drop technique, and the interfacial chemical reaction of Cu-Sn/SiC wetting couples was investigated and discussed. The Si ion can markedly enhance the wetting of Cu-Sn on 6H-SiC substrate, and those of the corresponding contact angles (θ) are raised partly, with the Si ion dose increasing due to the weakening interfacial chemical reactions among four Cu-Sn alloys and 6H-SiC ceramics. Moreover, the θ of Cu-Sn on (Si-)SiC substrate is first decreased and then increased from ~62° to ~39°, and ~70° and ~140°, with the Sn concentration increasing from 2.5%, 5% and 7.5% to 10%, which is linked to the reactivity of Cu-Sn alloys and SiC ceramic and the variation of liquid-vapor surface energy. Particularly, only a continuous graphite layer is formed at the interface of the Cu-10Sn/Si-SiC system, resulting in a higher contact angle (>40°).

ACS Style

Xiang Zhao Zhang; Pu Hao Xu; Gui Wu Liu; Awais Ahmad; Xiao Hui Chen; Ya Long Zhu; Asma Alothman; Shahid Hussain; Guan Jun Qiao. Synthesis, Characterization and Wettability of Cu-Sn Alloy on the Si-Implanted 6H-SiC. Coatings 2020, 10, 906 .

AMA Style

Xiang Zhao Zhang, Pu Hao Xu, Gui Wu Liu, Awais Ahmad, Xiao Hui Chen, Ya Long Zhu, Asma Alothman, Shahid Hussain, Guan Jun Qiao. Synthesis, Characterization and Wettability of Cu-Sn Alloy on the Si-Implanted 6H-SiC. Coatings. 2020; 10 (9):906.

Chicago/Turabian Style

Xiang Zhao Zhang; Pu Hao Xu; Gui Wu Liu; Awais Ahmad; Xiao Hui Chen; Ya Long Zhu; Asma Alothman; Shahid Hussain; Guan Jun Qiao. 2020. "Synthesis, Characterization and Wettability of Cu-Sn Alloy on the Si-Implanted 6H-SiC." Coatings 10, no. 9: 906.

Journal article
Published: 06 June 2020 in Journal of Alloys and Compounds
Reads 0
Downloads 0

In this study, the influence of Sm addition on microstructural evolution and mechanical properties of as-extruded Mg–9Li–5Al (LA95) alloy was characterized by OM, SEM, TEM, XRD and EDS. The morphology results showed that adding Sm resulted in the formation of Al2Sm phase, and the grains of the LA95 alloy were markedly refined with the addition of Sm. Additionally, the dislocation pile-up around the Al2Sm particles were observed by high-resolution transmission electron microscopy. The as-extruded LA95-0.4Sm alloy with granular Al2Sm phase showed optimal ultimate tensile strength of 283 MPa, which was about 25% higher than that of the matrix alloy. The main factors influencing the strength of as-extruded LA95-xSm alloys were as follows: (i) grain refinement strengthening, the lattice mismatch calculation results showed that the average lattice mismatch of (111)Al2Sm//(0001)α-Mg was 12.5%, which indicated that the Al2Sm phase served as an effective heterogeneous nucleation substrate of the α-Mg phase to refine the α-Mg phase in LA95 alloys; (ii) second phase strengthening, the fine Al2Sm particles exerted positive effects on strengthening by effectively hindering the dislocation line movement, thereby forming the dislocation pile-up adjacent to the strengthening phase Al2Sm.

ACS Style

Zhi Hu; Zheng Yin; Zhou Yin; Binbing Tang; Xiao Huang; Hong Yan; Honggun Song; Chao Luo; Xiaohui Chen. Influence of Sm addition on microstructural and mechanical properties of as-extruded Mg–9Li–5Al alloy. Journal of Alloys and Compounds 2020, 842, 155836 .

AMA Style

Zhi Hu, Zheng Yin, Zhou Yin, Binbing Tang, Xiao Huang, Hong Yan, Honggun Song, Chao Luo, Xiaohui Chen. Influence of Sm addition on microstructural and mechanical properties of as-extruded Mg–9Li–5Al alloy. Journal of Alloys and Compounds. 2020; 842 ():155836.

Chicago/Turabian Style

Zhi Hu; Zheng Yin; Zhou Yin; Binbing Tang; Xiao Huang; Hong Yan; Honggun Song; Chao Luo; Xiaohui Chen. 2020. "Influence of Sm addition on microstructural and mechanical properties of as-extruded Mg–9Li–5Al alloy." Journal of Alloys and Compounds 842, no. : 155836.

Journal article
Published: 22 November 2019 in Journal of Materials Research
Reads 0
Downloads 0

Solar-grade multicrystalline silicon ingots as raw material for solar cells were obtained from upgraded metallurgical silicon by directional solidification in an axial magnetic field. The influence of preparation technology on the microstructural characteristics of silicon ingots was investigated. Governing equations were used to simulate the silicon fluid flow and thermal fields during directional solidification. The results show that appropriately increasing melt temperature and/or decreasing pulling-down rate can be conductive to the growth of a coarse columnar grain. Meanwhile, the axial magnetic field promotes the formation of low-energy ∑3 twin boundaries and reduces the dislocations and impurities, where the total concentration of major metal impurities is with a mean of 0.459 ppmw in the range of 1/9 to 8/9 of height along the growth direction. It is shown from the simulation results that suppressing silicon melt flow in both radial and azimuthal directions and reducing the growth rate in the edge regions contribute to the formation of a flat solid–liquid interface, which is more consistent with the experimental results. Moreover, the formation mechanism of the twins and removal mechanism of the impurities were discussed.

ACS Style

Xiao-Hui Chen; Senlin Rao; Fayun Zhang. Preparation and microstructural characteristics of solar-grade multicrystalline silicon by directional solidification in an axial magnetic field. Journal of Materials Research 2019, 34, 3931 -3945.

AMA Style

Xiao-Hui Chen, Senlin Rao, Fayun Zhang. Preparation and microstructural characteristics of solar-grade multicrystalline silicon by directional solidification in an axial magnetic field. Journal of Materials Research. 2019; 34 (23):3931-3945.

Chicago/Turabian Style

Xiao-Hui Chen; Senlin Rao; Fayun Zhang. 2019. "Preparation and microstructural characteristics of solar-grade multicrystalline silicon by directional solidification in an axial magnetic field." Journal of Materials Research 34, no. 23: 3931-3945.

Journal article
Published: 15 October 2018 in Journal of Materials Research
Reads 0
Downloads 0

For thixoforming, it is necessary to have a good microstructure of fine, uniform, and globular grains in a semisolid range. In this study, the nano-Al2O3(Al2O3np)/Al7075 composites with a high solid fraction were fabricated by specially made Al2O3np containing Mg powders and semisolid ultrasonic vibration (SSUV) process. The influence of SSUV technology on primary α-Al grain and second phase in the composites was investigated. Microstructural studies revealed that a good semisolid slurry with an average grain size of 73 μm, a shape factor of 0.84, and a solid fraction of 0.715 could be obtained. Also, it could be shown that SSUV affected largely the size and type of the second phase as well as growth and nucleation of the primary α-Al grain. TEM analysis revealed that there are well-defined crystallographic orientation relationships between the second phases and α-Al, suggesting enhanced heterogeneous nucleation in Al7075 alloys. Moreover, mechanisms involved in the development of microstructure were discussed.

ACS Style

Xiao-Hui Chen; Hong Yan. Fabrication of Al7075–Al2O3np-based metal matrix composites with a high solid fraction for thixoforming. Journal of Materials Research 2018, 33, 4349 -4361.

AMA Style

Xiao-Hui Chen, Hong Yan. Fabrication of Al7075–Al2O3np-based metal matrix composites with a high solid fraction for thixoforming. Journal of Materials Research. 2018; 33 (24):4349-4361.

Chicago/Turabian Style

Xiao-Hui Chen; Hong Yan. 2018. "Fabrication of Al7075–Al2O3np-based metal matrix composites with a high solid fraction for thixoforming." Journal of Materials Research 33, no. 24: 4349-4361.

Journal article
Published: 01 October 2017 in Transactions of Nonferrous Metals Society of China
Reads 0
Downloads 0
ACS Style

Xiu-Liang Zou; Hong Yan; Xiao-Hui Chen. Evolution of second phases and mechanical properties of 7075 Al alloy processed by solution heat treatment. Transactions of Nonferrous Metals Society of China 2017, 27, 2146 -2155.

AMA Style

Xiu-Liang Zou, Hong Yan, Xiao-Hui Chen. Evolution of second phases and mechanical properties of 7075 Al alloy processed by solution heat treatment. Transactions of Nonferrous Metals Society of China. 2017; 27 (10):2146-2155.

Chicago/Turabian Style

Xiu-Liang Zou; Hong Yan; Xiao-Hui Chen. 2017. "Evolution of second phases and mechanical properties of 7075 Al alloy processed by solution heat treatment." Transactions of Nonferrous Metals Society of China 27, no. 10: 2146-2155.

Journal article
Published: 01 June 2017 in Journal of Alloys and Compounds
Reads 0
Downloads 0
ACS Style

Xiao-Hui Chen; Hong Yan. Constitutive behavior of Al2O3np/Al7075 composites with a high solid fraction for thixoforming. Journal of Alloys and Compounds 2017, 708, 751 -762.

AMA Style

Xiao-Hui Chen, Hong Yan. Constitutive behavior of Al2O3np/Al7075 composites with a high solid fraction for thixoforming. Journal of Alloys and Compounds. 2017; 708 ():751-762.

Chicago/Turabian Style

Xiao-Hui Chen; Hong Yan. 2017. "Constitutive behavior of Al2O3np/Al7075 composites with a high solid fraction for thixoforming." Journal of Alloys and Compounds 708, no. : 751-762.

Journal article
Published: 01 March 2016 in Materials & Design
Reads 0
Downloads 0
ACS Style

Xiao-Hui Chen; Hong Yan. Solid–liquid interface dynamics during solidification of Al 7075–Al 2 O 3np based metal matrix composites. Materials & Design 2016, 94, 148 -158.

AMA Style

Xiao-Hui Chen, Hong Yan. Solid–liquid interface dynamics during solidification of Al 7075–Al 2 O 3np based metal matrix composites. Materials & Design. 2016; 94 ():148-158.

Chicago/Turabian Style

Xiao-Hui Chen; Hong Yan. 2016. "Solid–liquid interface dynamics during solidification of Al 7075–Al 2 O 3np based metal matrix composites." Materials & Design 94, no. : 148-158.

Journal article
Published: 14 July 2015 in Journal of Materials Research
Reads 0
Downloads 0

Nanosized Al2O3 (Al2O3np) reinforced Al7075 composites were fabricated by specially made Al2O3np containing Mg powder and subtype multifrequency ultrasonic vibration. Compared to traditional techniques, Al2O3np was effectively dispersed in the matrix by the novel method. Microstructural studies showed that the addition of Al2O3np caused the grain refinement and that the resultant microstructures of composites depended on the dominant size and degree of Al2O3np clustering. The grain refinement could be mainly attributed to particle pushing mechanisms. Compared to the matrix alloy, the ultimate tensile and compressive strength of the as-cast composite with 1.5 wt% Al2O3np fabricated at 800 °C were increased by 59.6% and 42.6%, respectively. Transmission electron microscope analysis showed that high density dislocations and clear interfaces between particles and matrix were present in the grains, suggesting that the superior improvement of mechanical properties can be attributed to dislocation-type strengthening of matrix alloy and load transfer from matrix to hard nanoparticles.

ACS Style

Xiao-Hui Chen; Hong Yan. Fabrication of nanosized Al2O3 reinforced aluminum matrix composites by subtype multifrequency ultrasonic vibration. Journal of Materials Research 2015, 30, 2197 -2209.

AMA Style

Xiao-Hui Chen, Hong Yan. Fabrication of nanosized Al2O3 reinforced aluminum matrix composites by subtype multifrequency ultrasonic vibration. Journal of Materials Research. 2015; 30 (14):2197-2209.

Chicago/Turabian Style

Xiao-Hui Chen; Hong Yan. 2015. "Fabrication of nanosized Al2O3 reinforced aluminum matrix composites by subtype multifrequency ultrasonic vibration." Journal of Materials Research 30, no. 14: 2197-2209.