Evolution of Microstructure and Texture During Cold Deformation of Hot-Extruded GH3625 Alloy

doi:10.11900/0412.1961.2018.00414

CORC > 兰州理工大学 > 兰州理工大学

	Evolution of Microstructure and Texture During Cold Deformation of Hot-Extruded GH3625 Alloy
	Gao Yubi 1; Ding Yutian 1; Chen Jianjun 1; Xu Jiayu 1; Ma Yuanjun 1; Zhang Dong 2
刊名	ACTA METALLURGICA SINICA
	2019-04-11
卷号	55 期号:4 页码:547-554
关键词	GH3625 alloy cold deformation deformation twin dislocation density evolution of texture
ISSN号	0412-1961
DOI	10.11900/0412.1961.2018.00414
英文摘要	GH3625 alloy is a wrought nickel-based superalloy mainly used in aeronautical, aerospace, chemical, nuclear, petrochemical and marine applications industry due to its good combination of mechanical properties and corrosion resistance on prolonged high-temperature exposure to aggressive environments. However, the cold deformation microstructure directly determines the microstructure of the alloy pipe, thereby affecting the performance of the alloy pipe. In this work, the microstructure evolution, grain boundary characteristics distribution, dislocation density, stress distribution and texture evolution of the hot-extruded GH3625 superalloy during cold deformation were investigated by EBSD technique. The results show that the degree of grain deformation increases and the grain morphology changes from flat to thin strip, with the increase of cold deformation. The rotation of the crystal makes the grain boundary perpendicular to the loading pressure axis. With the increase of cold deformation, the high angle grain boundaries (HAGBs) gradually changes to the low angle grain boundaries (LAGBs), and the proportion of twin grain boundary increases gradually. The average of local misorientation ((theta) over bar (L)) increases with the increase of cold deformation, which can reflect the increase of dislocation density. With the increase of cold deformation, the uniformity of grain deformation gradually becomes better, and the stress concentration distribution gradually changes to the stress uniform distribution. With the cold deformation increases, the type of deformation texture remains basically unchanged, while the strength of the Copper texture {112}<111> with stable orientation is slightly reduced. Meanwhile, the Rotated-cube texture {001}<110> generated by inhomogeneous plastic deformation is reduced in strength. In addition, the formation of deformation twin results in a decrease in the strength of the Goss texture {110}<001> and the Brass-R texture {111}<112>.
资助项目	National Key Research and Development Program of China[2017YFA0700703] ; National Natural Science Foundation of China[51661019] ; Program for Major Projects of Science and Technology in Gansu Province[145RTSA004] ; Program for State Key Laboratory of Nickel and Cobalt Resources Comprehensive Utilization[301170503]
WOS研究方向	Metallurgy & Metallurgical Engineering
语种	中文
出版者	SCIENCE PRESS
WOS记录号	WOS:000461986500013
状态	已发表
内容类型	期刊论文
源URL	[http://119.78.100.223/handle/2XXMBERH/31958]
专题	兰州理工大学省部共建有色金属先进加工与再利用国家重点实验室
通讯作者	Ding Yutian
作者单位	1.Lanzhou Univ Technol, State Key Lab Adv & Recycling Nonferrous Met, Lanzhou 730050, Gansu, Peoples R China 2.Jinchuan Grp Ltd, State Key Lab Nickel & Cobalt Resources Comprehen, Jinchang 737100, Peoples R China
推荐引用方式 GB/T 7714	Gao Yubi,Ding Yutian,Chen Jianjun,et al. Evolution of Microstructure and Texture During Cold Deformation of Hot-Extruded GH3625 Alloy[J]. ACTA METALLURGICA SINICA,2019,55(4):547-554.
APA	Gao Yubi,Ding Yutian,Chen Jianjun,Xu Jiayu,Ma Yuanjun,&Zhang Dong.(2019).Evolution of Microstructure and Texture During Cold Deformation of Hot-Extruded GH3625 Alloy.ACTA METALLURGICA SINICA,55(4),547-554.
MLA	Gao Yubi,et al."Evolution of Microstructure and Texture During Cold Deformation of Hot-Extruded GH3625 Alloy".ACTA METALLURGICA SINICA 55.4(2019):547-554.