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In situ atomistic observation of the deformation mechanism of Au nanowires with twin–twin intersectionShuchun Zhao1,Qi Zhu1,Xianghai An2,Hua Wei3,Kexing Song4,Scott X.Mao5,Jiangwei Wang11. Center... intersection govern the whole deformation of the nanowire.These findings reveal the dynamic behaviors of twin–twin intersection under mechanical loading, which benefits further exploration of FCC metals......
Production of 150 cm wide AZ31 magnesium sheet by twin roll casting A. A. KAYA1, 2, O. DUYGULU1, S. UCUNCUOGLU1, G. OKTAY1, D. S. TEMUR1, O. YUCEL3 1. Materials Institute, TUBITAK MRC, Gebze...; Abstract: 150 cm wide AZ31 magnesium alloy sheet was produced by twin roll casting. The sheets of 6 mm thickness were cast......
. The predominant twin system of the FCC metals is the twin, and that for the body-centered cubic (BCC) metals is the {112}<111> twin. Although deformation twins, annealing twins or growth twins may form... twin activated by deformation is an important micro deformation mechanism for HCP metals that is produced by the lattice shear in the primary twin under internal stress. For the secondary twins......
have been investigated.Mostly one {1012} twin variant or a twin variant pair is activated in a grain,leading to a parallel {1012} twin lamellar structure.At the stage of twinning-dominated deformation(ε<8%),lamellar thickness decreases significantly with strain,from 5.55 to 2.49μm.The evolution of lamellar thickness during deformation is directly related to {1012} twin activity.When plastic strain......
The interaction and migration of deformation twin in an eutectic high-entropy alloy AlCoCrFeNi2.1Yaoli Zhang1,2,Jinguo Li1,3,Xinguang Wang1,Yiping Lu4,Yizhou Zhou1,Xiaofeng Sun11. Institute of Metal.... The deformation twin variants I and were formed by the edge dislocation 11 2 and the mixed dislocation 21 1 on the {111} crystal planes, respectively. Besides, the dislocation jogs and kinks caused by twin......
are not the positions for priority nucleation, which is different from the classic twin nucleation theory.Key words:magnesium alloy; twin boundary; recrystallization; deformation mode...和压缩两种变形方式的形变速率不同有关.退火保温实验结果表明,在相同条件下,锻造变形镁合金孪晶处比压缩变形镁合金孪晶处更易发生再结晶.研究不同孪晶处的形核方式,提出低温"孪晶界凸出形核"机理,发现某些孪晶变体即二次孪晶处并不是优先形核的位置,这与经典的孪生形核理论的观点不同.关键词:镁合金;孪晶界;再结晶;变形方式Effect of twin boundary on static......
Twin boundary: Controllable interface to fatigue crackingZhefeng Zhang,Linlin Li,Zhenjun Zhang,Peng ZhangShenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences摘 要:Twin boundaries(TBs) are key factors influencing the mechanical properties of crystalline materials. We have investigated the intrinsic......
Deformation behaviors of Cu bicrystals with an inclined twin boundary at multiple scalesL.L.Li,Z.J.Zhang,P.Zhang,J.Tan,J.B.Yang,Z.F.ZhangShenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences摘 要:Cu bicrystals of different sizes with a sole twin boundary(TB) inclined at 45?with respect to the loading......
deformation with the aim of introducing {10-12} twin lamellar structure. It has been found that higher strength and better ductility are obtained when tensile loading is perpendicular to the c axis...Plasticity Induced by Twin Lamellar Structure in Magnesium AlloyXiyan Zhang,Chao Lou,Jian Tu,Qing LiuSchool of Materials Science and Engineering,Chongqing University摘 要:
deformed GH3625 superalloy tube (ε=30%) and morphology of deformation twin 图3所示为GH3625合金管材在不同冷变形量下的显微组织.从图3(a)~(d)中明显看出,随着冷变形量的增加,晶粒的变形程度加大,晶粒尺寸逐渐减小.当ε=15%时,合金内部晶粒未发生明显的变形,晶粒仍然呈等轴状(见图3(a));当冷变形增加到35%时,晶粒已出现明.... And the morphology and formation mechanism of twin in the alloy were discussed. The results show that the cold deformation is the main factor which affects the plastic deformation mechanism of GH3625......