Polymer‐metal hybrid (PMH) structures, also known as metal‐polymer hybrid (MPH) structures, have received considerable attention from industry and academia due to the societal need for developing strong, lightweight, and durable structures for several applications in strategic areas, such as transportation, household appliances, energy, and biomedical devices. Injection overmolding is an advantageous technique for manufacturing PMH structures as it combines automation, a fast process, cost efficiency, and dimensional accuracy. This review presents a comprehensive discussion of recent advances reported in the literature concerning PMH structures fabricated by direct‐adhesion injection overmolding. Following a general introduction, the fundamentals of the injection overmolding technique are presented. Next, the potential of some metal surface preparation methods to ensure good adhesion, and thus outstanding mechanical performance in injection overmolded PMH structures is discussed. Correlations are then made between metal surface features, processing parameters, and the mechanical strength of injection overmolded polymer‐metal joints. Some applications of injection overmolded PMH structures are explored, and, lastly, the main conclusions and prospects on the use of injection overmolding are presented.

Carbon-based nanofillers have emerged as promising agents for enhancing the mechanical properties of polyamide 66 (PA66). This literature review emphasizes the increasing interest in nanocomposites due to their ability to significantly improve material properties, often surpassing traditional short fiber reinforced polymers, even at low nanofiller loadings. Across the studies reviewed, consistent enhancements in various quasi-static mechanical properties are observed upon the incorporation of nanofillers. Optimal carbon-based nanofiller loadings typically fall within the range of 0.25% to 1 wt%. Notably, significant improvements have been reported, with increases of up to 78% in Young’s modulus (E) and 138% in ultimate tensile strength (UTS). This comprehensive analysis highlights the potential of carbon-based nanofillers in enhancing the performance of polyamide 66, offering valuable insights for the design and development of advanced nanocomposite materials. Preliminary test results by the authors, where melt mixing was employed to produce PA66 carbon nanotube (CNT) nanocomposites with loadings of up to 1 wt%, show an increase in Young’s modulus whilst the ultimate tensile strength and strain at break (SaB) are reduced.