Effects of Heating and Hot Extrusion Process on Microstructure and Properties of Inconel 625 Alloy

doi:10.1007/s11595-016-1540-3

	Effects of Heating and Hot Extrusion Process on Microstructure and Properties of Inconel 625 Alloy
	Liu Dexue 1,2; Cheng Xiaowei 1,2; Zhang Xiao 1,2; Ding Yutian 1,2
刊名	JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
	2016-12
卷号	31 期号:6 页码:1368-1376
关键词	Inconel 625 alloy hot extrusion mechanical property microstructure evolution
ISSN号	1000-2413
DOI	10.1007/s11595-016-1540-3
英文摘要	The effects of the heating process and hot extrusion on the microstructure and properties of inconel 625 alloy were studied. The experimental results showed that the properties of Inconel 625 alloy could be improved through the heating process and hot extrusion concomitant with a reduced corrosion rate. The M23C6 carbide, generated in the heating process, was retained and distributed at the grain boundary during the process of hot extrusion, which had an important influence on both elongation and corrosion resistance. The improvement of the comprehensive properties of the material, as measured by a tensile test at room temperature, was correlated with the dissolution of segregation Nb. A typical ductile fracture changed to a cleavage fracture where secondary cracks could be clearly seen. With the increase of the extrusion ratio, the real extrusion temperature was higher, which led to more dissolution of the M23C6 carbide, decreased the number of secondary cracks, enhanced the effect of solid solution strengthening, and reduced the intergranular corrosion rate. Under the condition of a high extrusion ratio and a high extrusion speed, the less extrusion time made it possible to obtain organization with a smaller average grain size. Moreover, in this case, the M23C6 carbide and segregated Nb did not have enough time to diffuse. Thus all samples exhibited medium strengths and corrosion rates after extrusion.
资助项目	National Natural Science Foundation of China[51664041][51365029] ; Gansu Science and Technology Support Program-industrial Category[1604GKCA038] ; Program for Major Projects of Science and Technology in Gansu Province[145RTSA004]
WOS研究方向	Materials Science
语种	英语
出版者	WUHAN UNIV TECHNOLOGY
WOS记录号	WOS:000393051300032
内容类型	期刊论文
源URL	[http://119.78.100.223/handle/2XXMBERH/33519]
专题	材料科学与工程学院外国语学院省部共建有色金属先进加工与再利用国家重点实验室
作者单位	1.Lanzhou Univ Technol, Sch Mat Sci & Engn, Lanzhou 730050, Peoples R China; 2.State Key Lab Adv Proc & Recyling Nonferrous Met, Lanzhou 730050, Peoples R China
推荐引用方式 GB/T 7714	Liu Dexue,Cheng Xiaowei,Zhang Xiao,et al. Effects of Heating and Hot Extrusion Process on Microstructure and Properties of Inconel 625 Alloy[J]. JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION,2016,31(6):1368-1376.
APA	Liu Dexue,Cheng Xiaowei,Zhang Xiao,&Ding Yutian.(2016).Effects of Heating and Hot Extrusion Process on Microstructure and Properties of Inconel 625 Alloy.JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION,31(6),1368-1376.
MLA	Liu Dexue,et al."Effects of Heating and Hot Extrusion Process on Microstructure and Properties of Inconel 625 Alloy".JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION 31.6(2016):1368-1376.