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INVESTIGATION INTO HOT DEFORMATION BEHAVIOR OF SPRAY FORMED SUPERALLOY GH742 Z.H.Zhang1,S.F.Tian1,G.Q.Zhang1,Z.LI1 (1.National Key Lab. of High Temperature Structural Materials,Beijing Institute... of the alloy on this basis,the influence of deformation temperature and strain rate on the ductility of spray formed GH742 was investigated by using the Gleeble-3500 thermal-mechanical testing machine.It......
(Ti6Al4V); low temperature nitriding; cold deformation; wear resistance; tribology 1 Introduction Titanium and its alloys are widely used today in aerospace, medical health, desalination, energy... to deformation degree. Since the normal aging temperature of TC4 in industry is 500 °C, the experiment with higher temperature is promising. 3) The microhardness has positive correlation to deformation degree......
South University), Changsha 410083, China)Abstract:The hot deformation behaviors of Al-Zn-Mg-Sc-Zr alloy were investigated in a temperature range of 340-500 °C and a strain rate range of 0.001-10 s-1... stress increases with increasing strain rate and decreases with increasing deformation temperature. The phenomenon of dynamic recovery and dynamic recrystallization can be observed by microstructural......
for forming parameters optimization and quality control. Key words: hot ring rolling; coupled thermo-mechanical FE model; temperature distribution; deformation nonuniformity; FEM  ... as well as friction work converts to heat energy, which makes temperature of the ring change continuously and nonuniformly. Meanwhile, the change in temperature will remarkably affect deformation behavior......
J. Cent. South Univ. Technol. (2009) 16: 0738-0742 DOI: 10.1007/s11771-009-0122-3 Deformation division of metal flow behavior during extrusion process of 7075 aluminum alloy LI Feng(李 峰)1, CHU.... The characteristic quantities such as the second invariant of the deviator stress J2 and Lode’s coefficient μ were employed for the division of deformation area. The results show that when the metal is extruded......
is as high as 80% was made. Deformation parameters in the first stage was fixed firstly, then the temperature and the strain rate of deformation in the second stage were changed before quenching... the strain rate is, the more deformation induced ferrite is found in the low temperature area of the austenite non-recrystallization region. And the higher the strain rate is, the more deformation induced......
Research on elevated temperature deformation behavior of Ti-6Al-4V sheetsSUN Shengdi, GUO Bin, SHAN Debin, and ZHONG Yingying School of Materials Science & Engineering, Harbin Institute... of deformation temperature and strain rate on flow stress was evaluated, and deformation mechanism was analyzed. The results show that the stress-strain curves of Ti-6Al-4V (TC4) alloy sheet and TC4......
词:Mg-Gd-Y-Zr合金;第二相;挤压;超塑性变形 中图分类号:TG 146.2 文献标识码:A Effect of second phase on superplastic deformation of extruded rod of Mg-Gd-Y-Zr alloy LI Li1, 2, ZHANG Xin-ming1, DENG...-Y-Zr alloy; second phases; extrusion; superplastic deformation 镁合金结构材料的应用在......
the quality of products deformed by SSF, the thixotropic deformation behavior under the semi-solid state such as the influences of flow stress, deformation temperature and strain rate are analyzed[7-8... composites with various volume fractions of SiC particles are shown in Fig.3. The tendency of curves implies that the deformation temperature has a significant effect on the flow stress. It is observed......
Deformation behavior of SiC particle reinforced Al matrix composites based on EMA model CHENG Nan-pu(程南璞)1, 2, ZENG Su-min(曾苏民)1, 2, 3, YU Wen-bin(于文斌)1, 2, LIU Zhi-yi(刘志义)1, CHEN Zhi-qian(陈志谦)2... on the elastoplastic deformation behavior in Al matrix composites reinforced by SiC particles with an average size of 5 μm and volume fraction of 12% were quantitatively calculated by using the expanded effective......