Strengthening by grain size refinement and precipitation in friction stir processing (FSP) of Al-Cu alloys was investigated. Interestingly, even with significant grain refinement (<1 渭m), there was a substantial reduction in microhardness. This is attributed to the loss of precipitation hardening ...
The microstructure analysis reveals that the reduction in grain size inhibits the formation of 332113 twins during deformation. The yield strength of the alloy can be significantly enhanced by reducing the grain size. When the grain size measures 13 μm, the alloy can achieve a yield strength ...
Briefly, these different categories of work hardening rate recovery is caused by the reduction of dislocation mean free path, Λ, during plastic deformation [57,58]. In TWIP alloys, the newly formed twin boundaries decrease the Λ, while it is newly formed phase boundaries in TRIP alloys. ...
Gradient structures (GS) with various grain size distributions are successfully architectured in a commercial low-alloying steel by using the pre-torsion and thermal annealing routes, and the corresponding mechanical properties and hetero-deformation induced (HDI) strengthening and work-hardening are invest...
The average grain size of as-received T2 is 16 μm and the grain size of the annealed T2 increases with annealing temperature. Specifically, compared to the as-received sample, grain size increases by a factor of about 10 times to 185 μm for the 1000 °C annealed T2. The reduction ...
Yield asymmetry can also be reduced by grain-size reduction and precipitation strengthening. In this work these mechanisms were studied in several Mg-Sn-Zn... AE Davis,JD Robson,M Turski - 《Materials Science & Engineering A Structural Materials Properties Misrostructure & Processing》 被引量: ...
more grains--precipitate strengthening--cold work by tangling dislocations through workingHeating (annealing) can reduce dislocation density and increase grain size.15Diameter Reduction Procedure - ProblemA cylindrical rod of brass originally 10 mm (0.39 in) in diameter is to be cold worked by drawing...
The strengthening with excellent ductility in HEAs of this study is attributed to the grain size refinement and the development of the enhanced back stress by the phase boundaries between Cu-rich filaments and Cu-lean matrix with higher modulus and strength. The lower strength of annealed ...
Exchange-bias and grainsurface relaxations in nanostructured NiO/Ni induced by a particle size reduction. J. Phys. Chem. C 2012, 116, 4356–4364. Article Google Scholar Berkowitz, A. E.; Hansen, M. F.; Parker, F. T.; Vecchio, K. S.; Spada, F. E.; Lavernia, E. J.; ...
PtNiP nanoclusters anchored on P-doped graphene at a varied amount of NaH2PO2 (i.e., PtNiP/P-graphene, PtNiP0.5/P-graphene and PtNiP2/P-graphene) were prepared by co-reduction method (at 90 °C for 10 h) with the fabrication process of nucleation, growth and coalescent of Pt/NiP na...