Study on mechanical properties and microstructure analysis of welded joints of 7A05 aluminum alloy by Laser-MIG hybrid welding

Hongwei Liu; Jinglong Li; Zhihua Ma; Bing Ma; Shengqiang Feng

doi:10.2991/emeit.2012.324

Study on mechanical properties and microstructure analysis of welded joints of 7A05 aluminum alloy by Laser-MIG hybrid welding

Hongwei Liu, Jinglong Li, Zhihua Ma, Bing Ma, Shengqiang Feng

材料学院

科研成果: 书/报告/会议事项章节 › 会议稿件 › 同行评审

摘要

7A05 aluminum alloy joints were fabricated by Laser-MIG hybrid welding, of which the tensile strength was tested at room temperature. The tensile fracture surfaces and microstructure were analyzed by SEM and TEM. The fracture surface analysis showed fracture morphologies of small dimple of 2 ∼ 5μm on the heat affected zone (HAZ) and big dimple of 30 ∼ 50μm on the weld bead. The fracture is inter-granular fracture with a small amount of cleavage fracture. TEM analysis showed that the HAZ region didn't exists η'-phase, but Al₃Zr, i.e., during welding thermal cycle, the joints appeared obvious η'-phase back dissolved so that lost η'-phase dispersion strengthening effect. O, Na and Fe impurities were detected in the joint, of which the crack originated during tensile testing. Both the impurities and η'-phase back dissolved are responsible for the degrading of the welded joints mechanical properties.

源语言	英语
主期刊名	Proceedings of the 2nd International Conference on Electronic and Mechanical Engineering and Information Technology, EMEIT 2012
出版商	Atlantis Press
页	1465-1470
页数	6
ISBN（印刷版）	9789078677604
DOI	https://doi.org/10.2991/emeit.2012.324
出版状态	已出版 - 2012
活动	2012 2nd International Conference on Electronic and Mechanical Engineering and Information Technology, EMEIT 2012 - Shenyang, Liaoning, 中国期限: 26 9月 2012 → 28 9月 2012

出版系列

姓名	Proceedings of the 2nd International Conference on Electronic and Mechanical Engineering and Information Technology, EMEIT 2012

会议

会议	2012 2nd International Conference on Electronic and Mechanical Engineering and Information Technology, EMEIT 2012
国家/地区	中国
市	Shenyang, Liaoning
时期	26/09/12 → 28/09/12

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10.2991/emeit.2012.324

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Liu, H., Li, J., Ma, Z., Ma, B., & Feng, S. (2012). Study on mechanical properties and microstructure analysis of welded joints of 7A05 aluminum alloy by Laser-MIG hybrid welding. 在 Proceedings of the 2nd International Conference on Electronic and Mechanical Engineering and Information Technology, EMEIT 2012 (页码 1465-1470). (Proceedings of the 2nd International Conference on Electronic and Mechanical Engineering and Information Technology, EMEIT 2012). Atlantis Press. https://doi.org/10.2991/emeit.2012.324

Liu, Hongwei ; Li, Jinglong ; Ma, Zhihua 等. / Study on mechanical properties and microstructure analysis of welded joints of 7A05 aluminum alloy by Laser-MIG hybrid welding. Proceedings of the 2nd International Conference on Electronic and Mechanical Engineering and Information Technology, EMEIT 2012. Atlantis Press, 2012. 页码 1465-1470 (Proceedings of the 2nd International Conference on Electronic and Mechanical Engineering and Information Technology, EMEIT 2012).

@inproceedings{f5449d82fcb5406781cad8d0b58277e3,

title = "Study on mechanical properties and microstructure analysis of welded joints of 7A05 aluminum alloy by Laser-MIG hybrid welding",

abstract = "7A05 aluminum alloy joints were fabricated by Laser-MIG hybrid welding, of which the tensile strength was tested at room temperature. The tensile fracture surfaces and microstructure were analyzed by SEM and TEM. The fracture surface analysis showed fracture morphologies of small dimple of 2 ∼ 5μm on the heat affected zone (HAZ) and big dimple of 30 ∼ 50μm on the weld bead. The fracture is inter-granular fracture with a small amount of cleavage fracture. TEM analysis showed that the HAZ region didn't exists η'-phase, but Al3Zr, i.e., during welding thermal cycle, the joints appeared obvious η'-phase back dissolved so that lost η'-phase dispersion strengthening effect. O, Na and Fe impurities were detected in the joint, of which the crack originated during tensile testing. Both the impurities and η'-phase back dissolved are responsible for the degrading of the welded joints mechanical properties.",

keywords = "7A05 aluminum alloy, Laser-MIG hybrid welding, Mechanical properties, Microstructure analysis",

author = "Hongwei Liu and Jinglong Li and Zhihua Ma and Bing Ma and Shengqiang Feng",

year = "2012",

doi = "10.2991/emeit.2012.324",

language = "英语",

isbn = "9789078677604",

series = "Proceedings of the 2nd International Conference on Electronic and Mechanical Engineering and Information Technology, EMEIT 2012",

publisher = "Atlantis Press",

pages = "1465--1470",

booktitle = "Proceedings of the 2nd International Conference on Electronic and Mechanical Engineering and Information Technology, EMEIT 2012",

note = "2012 2nd International Conference on Electronic and Mechanical Engineering and Information Technology, EMEIT 2012 ; Conference date: 26-09-2012 Through 28-09-2012",

}

Liu, H, Li, J, Ma, Z, Ma, B & Feng, S 2012, Study on mechanical properties and microstructure analysis of welded joints of 7A05 aluminum alloy by Laser-MIG hybrid welding. 在 Proceedings of the 2nd International Conference on Electronic and Mechanical Engineering and Information Technology, EMEIT 2012. Proceedings of the 2nd International Conference on Electronic and Mechanical Engineering and Information Technology, EMEIT 2012, Atlantis Press, 页码 1465-1470, 2012 2nd International Conference on Electronic and Mechanical Engineering and Information Technology, EMEIT 2012, Shenyang, Liaoning, 中国, 26/09/12. https://doi.org/10.2991/emeit.2012.324

Study on mechanical properties and microstructure analysis of welded joints of 7A05 aluminum alloy by Laser-MIG hybrid welding. / Liu, Hongwei; Li, Jinglong; Ma, Zhihua 等.
Proceedings of the 2nd International Conference on Electronic and Mechanical Engineering and Information Technology, EMEIT 2012. Atlantis Press, 2012. 页码 1465-1470 (Proceedings of the 2nd International Conference on Electronic and Mechanical Engineering and Information Technology, EMEIT 2012).

科研成果: 书/报告/会议事项章节 › 会议稿件 › 同行评审

TY - GEN

T1 - Study on mechanical properties and microstructure analysis of welded joints of 7A05 aluminum alloy by Laser-MIG hybrid welding

AU - Liu, Hongwei

AU - Li, Jinglong

AU - Ma, Zhihua

AU - Ma, Bing

AU - Feng, Shengqiang

PY - 2012

Y1 - 2012

N2 - 7A05 aluminum alloy joints were fabricated by Laser-MIG hybrid welding, of which the tensile strength was tested at room temperature. The tensile fracture surfaces and microstructure were analyzed by SEM and TEM. The fracture surface analysis showed fracture morphologies of small dimple of 2 ∼ 5μm on the heat affected zone (HAZ) and big dimple of 30 ∼ 50μm on the weld bead. The fracture is inter-granular fracture with a small amount of cleavage fracture. TEM analysis showed that the HAZ region didn't exists η'-phase, but Al3Zr, i.e., during welding thermal cycle, the joints appeared obvious η'-phase back dissolved so that lost η'-phase dispersion strengthening effect. O, Na and Fe impurities were detected in the joint, of which the crack originated during tensile testing. Both the impurities and η'-phase back dissolved are responsible for the degrading of the welded joints mechanical properties.

AB - 7A05 aluminum alloy joints were fabricated by Laser-MIG hybrid welding, of which the tensile strength was tested at room temperature. The tensile fracture surfaces and microstructure were analyzed by SEM and TEM. The fracture surface analysis showed fracture morphologies of small dimple of 2 ∼ 5μm on the heat affected zone (HAZ) and big dimple of 30 ∼ 50μm on the weld bead. The fracture is inter-granular fracture with a small amount of cleavage fracture. TEM analysis showed that the HAZ region didn't exists η'-phase, but Al3Zr, i.e., during welding thermal cycle, the joints appeared obvious η'-phase back dissolved so that lost η'-phase dispersion strengthening effect. O, Na and Fe impurities were detected in the joint, of which the crack originated during tensile testing. Both the impurities and η'-phase back dissolved are responsible for the degrading of the welded joints mechanical properties.

KW - 7A05 aluminum alloy

KW - Laser-MIG hybrid welding

KW - Mechanical properties

KW - Microstructure analysis

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U2 - 10.2991/emeit.2012.324

DO - 10.2991/emeit.2012.324

M3 - 会议稿件

AN - SCOPUS:84871282167

SN - 9789078677604

T3 - Proceedings of the 2nd International Conference on Electronic and Mechanical Engineering and Information Technology, EMEIT 2012

SP - 1465

EP - 1470

BT - Proceedings of the 2nd International Conference on Electronic and Mechanical Engineering and Information Technology, EMEIT 2012

PB - Atlantis Press

T2 - 2012 2nd International Conference on Electronic and Mechanical Engineering and Information Technology, EMEIT 2012

Y2 - 26 September 2012 through 28 September 2012

ER -

Liu H, Li J, Ma Z, Ma B, Feng S. Study on mechanical properties and microstructure analysis of welded joints of 7A05 aluminum alloy by Laser-MIG hybrid welding. 在 Proceedings of the 2nd International Conference on Electronic and Mechanical Engineering and Information Technology, EMEIT 2012. Atlantis Press. 2012. 页码 1465-1470. (Proceedings of the 2nd International Conference on Electronic and Mechanical Engineering and Information Technology, EMEIT 2012). doi: 10.2991/emeit.2012.324

Study on mechanical properties and microstructure analysis of welded joints of 7A05 aluminum alloy by Laser-MIG hybrid welding

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