Effect of rotation speed on microstructure and mechanical properties of refill friction stir spot welded 6061-T6 aluminum alloy

被引：31

作者：

Zhou, L. ^{[1
,2
]}

Luo, L. Y. ^{[1
]}

Zhang, T. P. ^{[1
]}

He, W. X. ^{[1
]}

Huang, Y. X. ^{[2
]}

Feng, J. C. ^{[1
,2
]}

机构：

[1] Harbin Inst Technol Weihai, Shandong Prov Key Lab Special Welding Technol, Weihai 264209, Peoples R China

[2] Harbin Inst Technol, State Key Lab Adv Welding & Joining, Harbin 150001, Heilongjiang, Peoples R China

来源：

INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY | 2017年 / 92卷 / 9-12期

关键词：

Refill friction stir spot welding; Keyhole; Microstructure; Mechanical properties; FAILURE MECHANISMS; PARAMETERS; BEHAVIOR; JOINTS;

D O I：

10.1007/s00170-017-0359-1

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

Refill friction stir spot welding (RFSSW) has been used to weld 6061-T6 aluminum alloy, and keyhole free joints were successfully obtained. Effect of tool rotation speed on microstructure and mechanical properties of joint was investigated. The joint was divided into four zones, i.e., the base material (BM), heat-affected zone (HAZ), thermo-mechanically affected zone (TMAZ), and stir zone (SZ) according to microstructural evolution. Defect was not found on the surface of welded joint, but inner defects of partial bonding, bonding ligament, hook, and voids were observed within the welded joint. The microhardness of HAZ and TMAZ was lower than that of the BM, while the maximum microhardness was obtained in the SZ of welded joints. With increasing tool rotation speed from 1100 to 1700 rpm, microhardness decreased with increasing grain size in the weld. The maximum tensile shear failure load of 7522 N was obtained for the joint under tool rotation speed of 1500 rpm. Two different failure modes of plug fracture and tensile-shear mixed fracture were observed during the tensile shear tests.

引用

页码：3425 / 3433

页数：9

共 24 条

[1] Preliminary Investigation of the Microstructure and Mechanical Behaviour of 2024 Aluminium Alloy Friction Spot Welds
Amancio-Filho, Sergio T.
Camillo, Ana P. C.
Bergmann, Luciano
dos Santos, Jorge F.
Kury, Sebastiao E.
Machado, Nelson G. A.
[J]. MATERIALS TRANSACTIONS, 2011, 52 (05) : 985 - 991
[2] Effect of tool geometry on hook formation and static strength of friction stir spot welded aluminum 5754-O sheets
Badarinarayan, H.
Shi, Y.
Li, X.
Okamoto, K.
[J]. INTERNATIONAL JOURNAL OF MACHINE TOOLS & MANUFACTURE, 2009, 49 (11) : 814 - 823
[3] Hook formation and mechanical properties of friction spot welding in alloy 6061-T6
Cao, J. Y.
Wang, M.
Kong, L.
Guo, L. J.
[J]. JOURNAL OF MATERIALS PROCESSING TECHNOLOGY, 2016, 230 : 254 - 262
[4] Fatigue life assessment of friction spot welded 7050-T76 aluminium alloy using Weibull distribution
Effertz, P. S.
Infante, V.
Quintino, L.
Suhuddin, U.
Hanke, S.
dos Santos, J. F.
[J]. INTERNATIONAL JOURNAL OF FATIGUE, 2016, 87 : 381 - 390
[5] Iwashita T., 2003, Patent, Patent No. [US6601751B2, 6601751]
[6] Structural Data De-Anonymization: Theory and Practice
Ji, Shouling
Li, Weiqing
Srivatsa, Mudhakar
Beyah, Raheem
[J]. IEEE-ACM TRANSACTIONS ON NETWORKING, 2016, 24 (06) : 3523 - 3536
[7] Fracture mechanism of refill friction stir spot-welded 2024-T4 aluminum alloy
Li, Zhengwei
Ji, Shude
Ma, Yinan
Chai, Peng
Yue, Yumei
Gao, Shuangsheng
[J]. INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY, 2016, 86 (5-8) : 1925 - 1932
[8] Friction stir welding and processing
Mishra, RS
Ma, ZY
[J]. MATERIALS SCIENCE & ENGINEERING R-REPORTS, 2005, 50 (1-2) : 1 - 78
[9] Preliminary study on the feasibility of friction spot welding in PMMA
Oliveira, P. H. F.
Amancio-Filho, S. T.
dos Santos, J. F.
Hage, E., Jr.
[J]. MATERIALS LETTERS, 2010, 64 (19) : 2098 - 2101
[10] Influence of friction stir welding parameters on the microstructural and mechanical properties of AA 6016-T4 thin welds
Rodrigues, D. M.
Loureiro, A.
Leitao, C.
Leal, R. M.
Chaparro, B. M.
Vilaca, P.
[J]. MATERIALS & DESIGN, 2009, 30 (06): : 1913 - 1921

← 1 2 3 →