Influences of Cooling Rate After Solution Treatment on Microstructural Evolution and Mechanical Properties of Superalloy Rene 80

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	Influences of Cooling Rate After Solution Treatment on Microstructural Evolution and Mechanical Properties of Superalloy Rene 80
	Gao, Shuang; Hou, Jie-Shan; Dong, Kai-Xin; Zhou, Lan-Zhang; Zhou, LZ (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China.
	2017-03-01
发表期刊	ACTA METALLURGICA SINICA-ENGLISH LETTERS
ISSN	1006-7191
卷号	30 期号:3 页码:261-271
摘要	Influences of the cooling rate after solution treatment on microstructural evolution and mechanical properties of Rene 80 nickel-based superalloy were investigated by optical microscopy, scanning electron microscopy, transmission electron microscopy and mechanical test. Results showed that the high cooling rate decreased the size of secondary gamma' particles in the supersaturated matrix, but led to a high coarsening rate of gamma' particles during subsequent aging treatment. Despite various coarsening rates, the size and morphology of gamma' particles in the final microstructures of all samples were close due to the long enough holding time to an equilibrium state. During the aging of 870 degrees C/2 h, primary MC started to decompose with the carbide reaction: MC + gamma -> M6C or M23C6 + gamma'. And a number of observations showed that the coarsening of gamma' particles on grain boundaries resulted in the depletion of gamma' during aging treatment. The test results indicated that high cooling rate resulted in the presence of quench crack, and the air cooling method following solution treatment was an optimum heat treatment method for Rene 80.; Influences of the cooling rate after solution treatment on microstructural evolution and mechanical properties of Rene 80 nickel-based superalloy were investigated by optical microscopy, scanning electron microscopy, transmission electron microscopy and mechanical test. Results showed that the high cooling rate decreased the size of secondary gamma' particles in the supersaturated matrix, but led to a high coarsening rate of gamma' particles during subsequent aging treatment. Despite various coarsening rates, the size and morphology of gamma' particles in the final microstructures of all samples were close due to the long enough holding time to an equilibrium state. During the aging of 870 degrees C/2 h, primary MC started to decompose with the carbide reaction: MC + gamma -> M6C or M23C6 + gamma'. And a number of observations showed that the coarsening of gamma' particles on grain boundaries resulted in the depletion of gamma' during aging treatment. The test results indicated that high cooling rate resulted in the presence of quench crack, and the air cooling method following solution treatment was an optimum heat treatment method for Rene 80.
部门归属	[gao, shuang ; hou, jie-shan ; dong, kai-xin ; zhou, lan-zhang] chinese acad sci, inst met res, shenyang 110016, peoples r china
关键词	Ni-based Superalloy Cooling Rate Gamma' Precipitates Ripening Theory Heat Treatment Microstructural Evolution
学科领域	Metallurgy & Metallurgical Engineering
资助者	National Natural Science Foundation of China [51571191]
收录类别	SCI
语种	英语
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/78255
专题	中国科学院金属研究所
通讯作者	Zhou, LZ (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China.
推荐引用方式 GB/T 7714	Gao, Shuang,Hou, Jie-Shan,Dong, Kai-Xin,et al. Influences of Cooling Rate After Solution Treatment on Microstructural Evolution and Mechanical Properties of Superalloy Rene 80[J]. ACTA METALLURGICA SINICA-ENGLISH LETTERS,2017,30(3):261-271.
APA	Gao, Shuang,Hou, Jie-Shan,Dong, Kai-Xin,Zhou, Lan-Zhang,&Zhou, LZ .(2017).Influences of Cooling Rate After Solution Treatment on Microstructural Evolution and Mechanical Properties of Superalloy Rene 80.ACTA METALLURGICA SINICA-ENGLISH LETTERS,30(3),261-271.
MLA	Gao, Shuang,et al."Influences of Cooling Rate After Solution Treatment on Microstructural Evolution and Mechanical Properties of Superalloy Rene 80".ACTA METALLURGICA SINICA-ENGLISH LETTERS 30.3(2017):261-271.