搅拌头转速对YL113压铸铝合金FSW接头组织性能的影响

	搅拌头转速对YL113压铸铝合金FSW接头组织性能的影响
其他题名	Effect of Rotation Speed on Microstructure and Mechanical Properties of FSW Joints of Die Casting YL113 Aluminum Alloy
	吴春艳1 ; 宋东福 2; 宋丽莉1
	2017-11-25
发表期刊	Cailiao Daobao/Materials Reports
ISSN	1005-023X
卷号	31 期号:S2 页码:317-322+326
摘要	对4 mm厚的压铸态YL113铝合金进行了搅拌摩擦焊工艺试验研究,采用OM、SEM/EDS、XRD、万能拉伸试验机等分析研究了搅拌头转速对接头的微观组织和力学性能的影响。结果表明,当焊接速度为40 mm/min时,搅拌头转速在700~1 500 r/min范围内均可获得成形良好、无外观缺陷的焊缝,焊缝截面呈倒梯形,前进侧有明显分界线,而后退侧分界线模糊。热影响区保持铸态的枝晶形貌,但晶粒有一定程度的长大。热机影响区组织呈带状并遗传了母材组织的孔洞缺陷,其中前进侧的孔洞呈纤维状,其数量和尺寸随搅拌头转速增加而增加;后退侧除转速700 r/min时出现类裂纹状缺陷外,其余转速均有大尺寸孔洞缺陷出现,且数量和尺寸随搅拌头转速增加而增加。焊核区为典型变形组织,Si和其他第二相均呈细小颗粒状弥散分布。随搅拌头转速增加,焊接接头抗拉强度和伸长率均呈先增后减的规律,搅拌头转速为900 r/min时,抗拉强度和伸长率均达到最大值。
其他摘要	The die casting plates of YL1 1 3 aluminum alloy were welded by FSW.The microstructure and mechanical proper-ties of the joints were investigated by OM,SEM,EDS,XRD and universal testing machine.The results showed that the formation of weld is good with no appearance defects when the welding speed is 40 mm/min and the rotation speeds are 700—1 500 r/min,and cross section of the weld is inverted trapezoid with clear boundary at the AS(advancing side)and blurring boundary at the RS(retrea-ting side).The microstructure in HAZ is dendrite as cast and the grains grow to some extent.The microstructure in TMAZ at AS is banded structure with some threadiness defects,the number and size of which increase with the increasing of the rotation speed.The microstructure in TMAZ at RS is banded structure similarly,and there are some hole defects of large size,the number and size of which increase with the rotation speed increasing,except that cracks appear at the rotation speed of 700 r/min.The weld nugget is typical deformation microstructure with dispersively distributed fine particles of Si and other secondary phases.The tensile strength and elongation of the welded joint increase firstly and then decrease with the increasing of rotation speed,and both reach the maxi-mum at the rotation speed of 900 r/min.
关键词	压铸铝合金 FSW 组织力学性能
URL	查看原文
收录类别	北大核心 ; PKU ; EI ; ISTIC ; CSCD
语种	中文
原始文献类型	学术期刊
文献类型	期刊论文
条目标识符	https://ir.cqcet.edu.cn/handle/39TD4454/5230
专题	智能制造与汽车学院
作者单位	1.重庆电子工程职业学院机电学院; 2.广东省材料与加工研究所
第一作者单位	重庆电子科技职业大学
推荐引用方式 GB/T 7714	吴春艳,宋东福,宋丽莉. 搅拌头转速对YL113压铸铝合金FSW接头组织性能的影响[J]. Cailiao Daobao/Materials Reports,2017,31(S2):317-322+326.
APA	吴春艳,宋东福,&宋丽莉.(2017).搅拌头转速对YL113压铸铝合金FSW接头组织性能的影响.Cailiao Daobao/Materials Reports,31(S2),317-322+326.
MLA	吴春艳,et al."搅拌头转速对YL113压铸铝合金FSW接头组织性能的影响".Cailiao Daobao/Materials Reports 31.S2(2017):317-322+326.

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