Tensile Properties of Cast Alloy IN625 in Relation to δ Phase Precipitation

作     者：Yi-Qiang Mu Chang-Shuai Wang Wen-Long Zhou Lan-Zhang Zhou 

作者机构：Institute of Metal ResearchChinese Academy of Science School of Materials Science and EngineeringDalian University of Technology 

出 版 物：《Acta Metallurgica Sinica(English Letters)》 (金属学报（英文版）)

年 卷 期：2019年第32卷第4期

页      面：535-540页

核心收录：

学科分类：080802[工学-电力系统及其自动化] 0808[工学-电气工程] 0817[工学-化学工程与技术] 0806[工学-冶金工程] 08[工学] 0807[工学-动力工程及工程热物理] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0802[工学-机械工程] 0703[理学-化学] 0811[工学-控制科学与工程] 

基　　金：financially supported by the National Key Research and Development Program of China (No. 2017YFB0305204) the National Natural Science Foundation of China (No. 51571191) 

主　　题：δ Phase Cast alloy IN625 Tensile properties Advanced ultra-supercritical(AUSC) 

摘      要：The relationship between the tensile properties and S(delta) phase precipitation in cast alloy IN625 was investigated in this paper. Although the influences of δ phase on the mechanical properties have been pointed out in our previous work, the relationship is still not directly determined due to the coexistence of γ(gamma double prime) and δ precipitates. In order to exclude the effect from γ phase, various fractions of δ precipitates with few γ precipitates were obtained by a set of experimental alloys aging at 750 ℃, and tensile tests were conducted in parallel. The results showed that both yield strength and ultimate tensile strength increased nearly in linear with increasing δ phase fraction, while the elongation was relatively and limitedly affected by δ precipitation when the area fraction of δ phase was above 10%.