Microstructure evolution in a Ni–Mo–Cr superalloy subjected to simulated heat-affected zone thermal cycle with high peak temperature》.pdfVIP

Materials and Design 86 (2015) 230–236 Contents lists available at ScienceDirect Materials and Design journal homepage: www. /locate/jmad Microstructure evolution in a Ni–Mo–Cr superalloy subjected to simulated heat-affected zone thermal cycle with high peak temperature Jianguo Yang a,⁎, Yanming He a, Chunjie Qin a, Wenjun Zhao b, Shuangjian Chen c, Zengliang Gao a a Institute of Process Equipment and Control Engineering, Zhejiang University of Technology, Hangzhou 310014, China b Zhejiang Province Key Laboratory of Soldering Brazing Materials and Technology, Hangzhou 310011, China c Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China a r t i c l e i n f o a b s t r a c t Article history: A typical Ni–Mo–Cr superalloy with basic composition of Ni–17Mo–7Cr (wt.%) was fabricated and the relation- Received 6 March 2015 ship between the microstructure and mechanical properties while it underwent simulated heat-affected zone Received in revised form 12 July 2015 thermal cycle (HAZ) treatment was investigated. The results show that the Ni–Mo–Cr alloy was mainly made Accepted 14 July 2015 up of Ni based solid solution and MoC carbides. The critical peak temperature that a unique lamellar-like struc- Available online 18 July 2015 ture occurred in the alloy was found to be 1300 °C, and they were firstly determined to be Ni matrix and carbides (MoC and c