Microstructure Evolution During Solution Treatment and Its Effects on the Properties of Ni-Fe-Cr Alloy

doi:10.11900/0412.1961.2017.00210

IMR OpenIR

	Microstructure Evolution During Solution Treatment and Its Effects on the Properties of Ni-Fe-Cr Alloy
	Chen Shenghu; Rong Lijian
通讯作者	Chen Shenghu(chensh@imr.ac.cn)
	2018-03-11
发表期刊	ACTA METALLURGICA SINICA
ISSN	0412-1961
卷号	54 期号:3 页码:385-392
摘要	Ni-Fe-Cr alloys have been widely used for petrochemical, chemical and nuclear application due to their superior corrosion resistance and good workability. Nowadays, Ni-Fe-Cr alloys with higher strength are demanded for the engineering application. Increasing the carbon content could enhance the strength of Ni-Fe-Cr alloys due to the solid-solution strengthening effect of interstitial carbon atoms. However, an increase in the carbon content would promote the precipitation of carbides, which would reduce the corrosion resistance. In order to optimize the carbon content and determine the solution treatment, microstructure evolution during solution treatment and its effects on the properties of Ni-Fe-Cr alloys with different carbon content were investigated using OM and SEM. The results show that variation in carbon content affects the carbide dissolution and grain size during solution treatment, which affects the mechanical properties and intergranular corrosion susceptibility of Ni-Fe-Cr alloys. For the Ni-Fe-Cr alloy with carbon content of 0.010%, M23C6 carbides produced during the hot-working process do not exist after solution treatment at 950 degrees C. For the alloy with carbon content of 0.026%, M23C6 carbides are dissolved into the matrix when the solution temperature increases to 1000 degrees C. An increase in the carbon content from 0.010% to 0.026% results in an increased tensile strength and has slightly observable effect on the elongation. The alloys with the carbon content in the range of 0.010%similar to 0.026% have lower intergranular corrosion susceptibility. As the carbon content increases to 0.056%, M23C6 carbides could not be dissolved even at the solution temperature of 1050 degrees C, and inhomogenous grain-size distribution is observed. The presence of undissolved M23C6 carbide weakens the solid-solution strengthening effect of carbon atoms, and significantly increases the susceptibility to intergranular corrosion.
关键词	Ni-Fe-Cr alloy solution treatment carbide tensile property intergranular corrosion
资助者	National Natural Science Foundation of China
DOI	10.11900/0412.1961.2017.00210
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[51401215]
WOS研究方向	Metallurgy & Metallurgical Engineering
WOS类目	Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000427121400004
出版者	SCIENCE PRESS
引用统计	被引频次：2[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/321006/127465
专题	中国科学院金属研究所
通讯作者	Chen Shenghu
作者单位	Chinese Acad Sci, Inst Met Res, Key Lab Nucl Mat & Safety Assessment, Shenyang 110016, Liaoning, Peoples R China
推荐引用方式 GB/T 7714	Chen Shenghu,Rong Lijian. Microstructure Evolution During Solution Treatment and Its Effects on the Properties of Ni-Fe-Cr Alloy[J]. ACTA METALLURGICA SINICA,2018,54(3):385-392.
APA	Chen Shenghu,&Rong Lijian.(2018).Microstructure Evolution During Solution Treatment and Its Effects on the Properties of Ni-Fe-Cr Alloy.ACTA METALLURGICA SINICA,54(3),385-392.
MLA	Chen Shenghu,et al."Microstructure Evolution During Solution Treatment and Its Effects on the Properties of Ni-Fe-Cr Alloy".ACTA METALLURGICA SINICA 54.3(2018):385-392.