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strain, the severe plastic deformation leads to the grain boundary difficult to distinguish, indicating that high density dislocations are piled up at the grain boundary. Under the different strain levels...]. With the strain increasing, the pyramidal slipping and {102} twins can be activated to accommodate the plastic deformation of the zirconium alloy because of high local shear stress. With the strain......
plastic deformation was investigated.The techniques employed were tensile test at room and elevated temperature,deep drawing tests at various strain rates,X-ray diffraction test and potentiodynamic... deformation.It was observed that corrosion resistance after plastic deformation was a function of deformation temperature and alloying elements.关键词:......
High Temperature Deformation of a β''(NiAl) Precipitation Strengthened Ferritic Alloy S.M.Zhu1,S.C.Tjong2 (1.Japan Ultra-high Temperature Materials Research Institute,573-3 Okiube, Ube, Yamaguchi... alloy was tested under low cycle fatigue and creep at elevated temperatures. The dislocation microstructures developed were examined by transmission electron microscopy (TEM). The deformation behavior......
. The results show that the TiNi alloy processed by ECAE undergoes severe plastic deformation, and lowering the deformation temperature and increasing the number of extrusions contribute to grain refine...Deformation temperature and postdeformation annealing effects on severely deformed TiNi alloy by equal channel angular extrusionZhenhua Li and Xianhua Cheng School of Mechanical and Power Engineering......
Mechanism of localized severe plastic deformation and damage fracture in fine-blanking using mixed displacement and pressure FEM XIE Xiao-long(谢晓龙)1, ZHAO Zhen(赵 震)1, YU Song(虞 松)1, GU Sheng... Engineering Co Ltd, Suzhou 215004, China Received 4 November 2005; accepted 12 April 2006 Abstract: A mixed displacement-pressure updated Lagrange FEM was used to simulate the severe plastic deformation......
proposed. Key words: Al-Mg aluminum alloy; severe plastic deformation; high pressure torsion; dislocation configurations; grain refinement; deformation mechanism 1 Introduction Over the last two decades... to believe that such dipoles could be formed due to a very high local stress resulted from the significant plastic deformation. The introduction of dipoles near GBs is likely to increase the stored......
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. Therefore, when the vibration energy is low, there are large and many twins in deformation structure. At this time, the plastic deformation is dominated by twins. When the vibration energy is high... the specimen enters into the plastic deformation due to the hardening effect. The softening theory cannot interpret the hardening phenomenon with brittle fracture by supplying high energy to the specimens......
in the process of defect evolution and among gradations. The increase of the local temperature with the increase of deformation-induced heating effect in ABS is obvious. Moreover, the shape of plastic zone... adopt the variation of the temperature field to investigate the plastic deformation. The boundary of plastic zoon is similar to the isotherm of temperature. Taking ABS specimen with a defect......
in this study, the elastic modulus mainly depends on the plastic deformation temperature. Interestingly, this alloy maintains a high elastic modulus at high temperatures. The elastic modulus...℃. The elongation to fracture increases from 10% to 36% as the temperature increases from 800℃ to 1000℃. The deformation is dominated by γ′ shearing and the high-density dislocations are observed in matrix......