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Experimental Study of Microstructure Evolution during Tempering of Quenched Steel and Its Application CHEN Nan1,SHI Wei1,YAO Ke-fu1,WANG Hong-peng1 (1.Mechanical Engineering Department, Tsinghua University, Beijing 100084, P.R. China) 摘要:Microstructure evolution during tempering of quenched steel was studied via dilatometric experiments.Temperature ranges of transformation were determined......
Microstructure and Mechanical Properties of Tic/NiCrMo Cermets Produced by Liquid Sintering Technique Jing BI1,Dehui GUAN1,Yue LIU1,Baohai YU1 (1.Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110015) 摘要:The effect of M additions on the microstructure and mechanical properties of TiC-based cermet produced by li oquid sintering method of powder metallurgy was investigated......
；Zn含量的增加降低了Al在Mg中的溶解极限,促进了β-Mg17Al12相在晶界的析出及α-Mg+β-Mg17Al12离异共晶组织的形成；Zn元素的偏析倾向为激活成分过冷区内的形核质点提供了驱动力,从而阻碍了晶粒长大. 关键词:镁合金；喷射成形；微观组织 中图分类号:TG132.1+1 文献标识码:A Microstructure.... The microstructure evolution of the alloys was observed. The microstructure analysis shows that the microstructure of the conventional as-cast AZ91 alloy consists of coarse grains, and the brittle β-Mg17Al12 phases......
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Microstructure evolution of TA15 titanium alloy during hot power spinningCHEN Yong, XU Wen-chen, SHAN De-bin, GUO Bin(School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China)Abstract:The microstructure evolution of TA15 titanium alloy during hot power spinning was studied. Effects of wall reduction on microstructure evolution of TA15 titanium alloy were......
Microstructure of hot-pack rolled Ti-43Al-9V-0.3Y alloyCHEN Yu-yong(陈玉勇), KONG Fan-tao(孔凡涛), CHEN Zi-yong(陈子勇), TIAN Jing(田 竞)(School of Materials Science and Engineering,Harbin Institute of Technology, Harbin 150001, China)Abstract:A kind of Ti-43Al-9V-0.3Y alloy sheet material using hot-pack rolling method is prepared. The microstructures of this alloy containing α2/γ lamellar microstructure......
; 文献标识码:A Microstructure of Be/AlSi/Be welding joint by laser LI Yu-bin, MENG Da-qiao, LIU Ke-zhao, XIE Zhi-qiang, LI Sheng-he (China Academy of Engineering Physics, Mianyang 621900, China) Abstract: Using AlSi alloy as transition material, beryllium with beryllium was welded by laser. The microstructure and performance of the welding joint were studied by means of nanoindentation......
size after filling has a coincidence relation with that of primary phase before filling. Key words: initial structure; microstructure evolution; semi-solid; filling process ...; 浇注前初生相的微观组织特征 Table 1 Microstructure characteristic of primary phase before pouring 2.2 沿程流动中初生固相率的变化 在研究沿程流动过程中固相率的变化时,重点考察了表1中的1,3,5和7号试样,原因是从初始组织中低固相率抽取2个,高固相率抽取2个,因此,具有一定的代表性......
and this character is still retained until 450 ℃, but the difference decreases. Key words: rare earth magnesium alloy; homogenization; microstructure ...535 ℃,16 h. 图6 经过双级均匀化后合金的微观组织相应的晶界元素面扫描分析 Fig.6 Microstructure(a) of GWN751K alloy after two step homogenization and corresponding element scanning analysis of Y(b), Nd(c) and Gd(d......
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