Effect of welding speed and post-weld aging on the microstructure and mechanical properties of friction stir welded B4Cp/6061A1-T6 composites

doi:10.1016/j.jmatprotec.2019.05.023

IMR OpenIR

	Effect of welding speed and post-weld aging on the microstructure and mechanical properties of friction stir welded B4Cp/6061A1-T6 composites
	Li, Y. Z.1,4; Zan, Y. N.2,3; Wang, Q. Z.1; Xiao, B. L.2; Ma, Z. Y.2
通讯作者	Wang, Q. Z.(qzhwang@imr.ac.cn) ; Ma, Z. Y.(zyma@imr.ac.cn)
	2019-11-01
发表期刊	JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
ISSN	0924-0136
卷号	273 页码:11
摘要	2.9 mm thick 20 wt% B4Cp/6061A1-T6 composite sheets were friction stir welded using a threaded cermet tool at welding speeds of 50-400 mm/min and a tool rotating rate of 1000 rpm and then subjected to post-weld artificial aging. Sound joints were achieved under all welding speeds. The threaded cermet pin only exhibited slight abrasion at the top thread of the screw after all of the welding operations with a total length of 1200 mm. The B4C particles were blunted and fragmented, and uniformly distributed in the nugget zone (NZ), due to the severe material deformation combined with the particle/pin interaction. The fine precipitates in the matrix alloy were mostly dissolved in the NZ but were significantly coarsened in the heat affected zone (HAZ). The joints exhibited significantly decreased tensile strength compared with the base material. The joint strength increased slightly with increasing welding speed, with maximum joint efficiency of similar to 70% at 400 mm/min. Artificial aging resulted in significant improvement in the NZ hardness and joint strength due to the re-precipitation of the precipitates, with a larger increment for the joint under higher welding speed. The joint at 400 mm/min exhibited the highest joint efficiency of similar to 85% after artificial aging. Artificial aging changed the hardness profiles of the NZ from flat to "M" shapes due to the change in quantities of solutes after FSW with increasing distance from the NZ centerline. The fracture of both as-welded and aged joints occurred in the HAZ.
关键词	Metal-matrix composites (MMCs) Friction stir welding Microstructures Mechanical testing Heat treatment
资助者	National Natural Science Foundation of China
DOI	10.1016/j.jmatprotec.2019.05.023
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[U1508216] ; National Natural Science Foundation of China[51771194] ; National Natural Science Foundation of China[51331008]
WOS研究方向	Engineering ; Materials Science
WOS类目	Engineering, Industrial ; Engineering, Manufacturing ; Materials Science, Multidisciplinary
WOS记录号	WOS:000479025200008
出版者	ELSEVIER SCIENCE SA
引用统计	被引频次：18[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/321006/134958
专题	中国科学院金属研究所
通讯作者	Wang, Q. Z.; Ma, Z. Y.
作者单位	1.Chinese Acad Sci, Inst Met Res, Key Lab Nucl Mat & Safety Assessment, 72 Wenhua Rd, Shenyang 110016, Liaoning, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Liaoning, Peoples R China 3.Univ Sci & Technol China, Shenyang 110016, Liaoning, Peoples R China 4.Lorraine Univ, Inst Jean Lamour, F-54011 Nancy, France
推荐引用方式 GB/T 7714	Li, Y. Z.,Zan, Y. N.,Wang, Q. Z.,et al. Effect of welding speed and post-weld aging on the microstructure and mechanical properties of friction stir welded B4Cp/6061A1-T6 composites[J]. JOURNAL OF MATERIALS PROCESSING TECHNOLOGY,2019,273:11.
APA	Li, Y. Z.,Zan, Y. N.,Wang, Q. Z.,Xiao, B. L.,&Ma, Z. Y..(2019).Effect of welding speed and post-weld aging on the microstructure and mechanical properties of friction stir welded B4Cp/6061A1-T6 composites.JOURNAL OF MATERIALS PROCESSING TECHNOLOGY,273,11.
MLA	Li, Y. Z.,et al."Effect of welding speed and post-weld aging on the microstructure and mechanical properties of friction stir welded B4Cp/6061A1-T6 composites".JOURNAL OF MATERIALS PROCESSING TECHNOLOGY 273(2019):11.