Analytical investigation of grain size dependence of microhardness in high nickel-containing reheated weld metal

doi:10.1016/j.acme.2017.04.001

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	Analytical investigation of grain size dependence of microhardness in high nickel-containing reheated weld metal
	Mao, Gaojun 1,2; Cao, Rui 1,2; Chen, Jianhong 1,2; Guo, Xili 3; Jiang, Yong 3
刊名	ARCHIVES OF CIVIL AND MECHANICAL ENGINEERING
	2017-09
卷号	17 期号:4 页码:935-942
关键词	Prior austenite grain Subgrain In situ observation Microstructure Microhardness
ISSN号	1644-9665
DOI	10.1016/j.acme.2017.04.001
英文摘要	Grain size dependence of microhardness has been addressed in the bainitic reheated weld metals by in situ observation of morphological evolution and characterization of microstructural development. A higher cooling rate promotes the boundary of smaller prior austenite grains to provide more effective sites for primary bainitic ferrite nucleation, yet a lower cooling rate is increasingly beneficial to sympathetic nucleation as well as impingement of secondary bainitic ferrite. The microstructures, obtained by cooling at a higher rate and composed of abundant lath bainite, are closer to the microstructures in the raw weld metal than those cooled at a lower rate, including lath bainite, acicular ferrite and inter-critical ferrite. Microhardness is decisive by prior austenite grain size mainly, as well as microstructures. Smaller grains contribute notably to microhardness, and it is worth stressing that the sizes of smaller grains lie on prior austenite grain boundaries rather than the subboundaries generated by intragranular acicular ferrite and inter-critical ferrite. (C) 2017 Politechnika Wroclawska. Published by Elsevier Sp. z o.o. All rights reserved.
资助项目	National Nature Science Foundation of China[51675255] ; Pre-research of National Basic Research Program of China[2014CB660810] ; Rose Willow Outstanding Individual Programs of Lanzhou University of Technology[J201203]
WOS研究方向	Engineering ; Materials Science
语种	英语
出版者	ELSEVIER URBAN & PARTNER SP Z O O
WOS记录号	WOS:000416528900020
状态	已发表
内容类型	期刊论文
源URL	[http://119.78.100.223/handle/2XXMBERH/33123]
专题	省部共建有色金属先进加工与再利用国家重点实验室材料科学与工程学院
通讯作者	Cao, Rui; Chen, Jianhong
作者单位	1.Lanzhou Univ Technol, Dept Mat Sci & Engn, Lanzhou 730050, Gansu, Peoples R China 2.Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Gansu, Peoples R China 3.Atlantic China Welding Concumables Inc, Zigong 643000, Peoples R China
推荐引用方式 GB/T 7714	Mao, Gaojun,Cao, Rui,Chen, Jianhong,et al. Analytical investigation of grain size dependence of microhardness in high nickel-containing reheated weld metal[J]. ARCHIVES OF CIVIL AND MECHANICAL ENGINEERING,2017,17(4):935-942.
APA	Mao, Gaojun,Cao, Rui,Chen, Jianhong,Guo, Xili,&Jiang, Yong.(2017).Analytical investigation of grain size dependence of microhardness in high nickel-containing reheated weld metal.ARCHIVES OF CIVIL AND MECHANICAL ENGINEERING,17(4),935-942.
MLA	Mao, Gaojun,et al."Analytical investigation of grain size dependence of microhardness in high nickel-containing reheated weld metal".ARCHIVES OF CIVIL AND MECHANICAL ENGINEERING 17.4(2017):935-942.