Microstructures and properties of DZ40M Co-based superalloy after long-term ageing at 850 degrees C

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	Microstructures and properties of DZ40M Co-based superalloy after long-term ageing at 850 degrees C; Microstructures and properties of DZ40M Co-based superalloy after long-term ageing at 850 degrees C
	W. H. Jiang; X. D. Yao; H. R. Guan; Z. Q. Hu
	1998 ; 1998
发表期刊	Transactions of Nonferrous Metals Society of China ; Transactions of Nonferrous Metals Society of China
ISSN	1003-6326 ; 1003-6326
卷号	8 期号:4 页码:617-621
摘要	DZ40M is a newly developed directionally solidified Go-based superalloy. Its microstructural characteristics and mechanical properties at room and elevated temperatures after ageing for 100 similar to 1000 h at 850 degrees C were studied. The results showed that 100 h ageing at 850 degrees C results in a substantial increase of tensile strength at room temperature and stress-rupture life at elevated temperatures, serious decrease of ductility at room temperature and improvement for stress-rupture ductility. With increasing ageing time, stress-rupture life tends to decrease and the other properties keep at essential constant. During ageing, primary carbides M7C3 and MC decompose sluggishly, fine M23C6 precipitates copiously around them and M6C forms on the surface of some M7C3. The increased strength of the aged alloy is attributed to a strong interaction between M23C6 and dislocations.; DZ40M is a newly developed directionally solidified Go-based superalloy. Its microstructural characteristics and mechanical properties at room and elevated temperatures after ageing for 100 similar to 1000 h at 850 degrees C were studied. The results showed that 100 h ageing at 850 degrees C results in a substantial increase of tensile strength at room temperature and stress-rupture life at elevated temperatures, serious decrease of ductility at room temperature and improvement for stress-rupture ductility. With increasing ageing time, stress-rupture life tends to decrease and the other properties keep at essential constant. During ageing, primary carbides M7C3 and MC decompose sluggishly, fine M23C6 precipitates copiously around them and M6C forms on the surface of some M7C3. The increased strength of the aged alloy is attributed to a strong interaction between M23C6 and dislocations.
部门归属	chinese acad sci, inst met res, shenyang 110015, peoples r china. shenyang polytech univ, dept met meterials engn, shenyang 110023, peoples r china. ; chinese acad sci, inst met res, shenyang 110015, peoples r china. shenyang polytech univ, dept met meterials engn, shenyang 110023, peoples r china.
关键词	Directional Solidification Directional Solidification Co-based Superalloy Co-based Superalloy Long-term Ageing Long-term Ageing Mechanical Property Mechanical Property
URL	查看原文 ; 查看原文
WOS记录号	WOS:000077866400018 ; WOS:000077866400018
引用统计	被引频次：4[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/37690
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	W. H. Jiang,X. D. Yao,H. R. Guan,et al. Microstructures and properties of DZ40M Co-based superalloy after long-term ageing at 850 degrees C, Microstructures and properties of DZ40M Co-based superalloy after long-term ageing at 850 degrees C[J]. Transactions of Nonferrous Metals Society of China, Transactions of Nonferrous Metals Society of China,1998, 1998,8, 8(4):617-621, 617-621.
APA	W. H. Jiang,X. D. Yao,H. R. Guan,&Z. Q. Hu.(1998).Microstructures and properties of DZ40M Co-based superalloy after long-term ageing at 850 degrees C.Transactions of Nonferrous Metals Society of China,8(4),617-621.
MLA	W. H. Jiang,et al."Microstructures and properties of DZ40M Co-based superalloy after long-term ageing at 850 degrees C".Transactions of Nonferrous Metals Society of China 8.4(1998):617-621.