LASER SURFACE REINFORCEMENT OF THE Ti/Al TIG WELDED JOINT

Zhiyun Ye, Jianing Li, Juan Wang, Shubo Xu, Cainian Jing, Yanhua Zhao, Guanchao Li, Xinzhu Gan, Fukun Ma and Fusheng Yu
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Zhiyun Ye: School of Materials Science and Engineering, Shandong Jianzhu University, Jinan 250101, Shandong, P. R. China
Jianing Li: School of Materials Science and Engineering, Shandong Jianzhu University, Jinan 250101, Shandong, P. R. China
Juan Wang: #x2020;School of Materials Science and Engineering, Shandong University, Jinan 250061, China
Shubo Xu: School of Materials Science and Engineering, Shandong Jianzhu University, Jinan 250101, Shandong, P. R. China
Cainian Jing: School of Materials Science and Engineering, Shandong Jianzhu University, Jinan 250101, Shandong, P. R. China
Yanhua Zhao: #xA7;School of Mechanical and Electronic Engineering, Shandong Jianzhu University, Jinan 250101, Shandong, P. R. China
Guanchao Li: #x2021;Faculty for Energy, Clausthal University of Technology, Clausthal-Zellerfeld 38678, Germany
Xinzhu Gan: School of Materials Science and Engineering, Shandong Jianzhu University, Jinan 250101, Shandong, P. R. China
Fukun Ma: School of Materials Science and Engineering, Shandong Jianzhu University, Jinan 250101, Shandong, P. R. China
Fusheng Yu: #xA7;School of Mechanical and Electronic Engineering, Shandong Jianzhu University, Jinan 250101, Shandong, P. R. China

Surface Review and Letters (SRL), 2020, vol. 27, issue 12, 1-5

Abstract: The microstructure of the Ti/Al weld seam (WS) was uniform, and a good metallurgy bond between TC4/5052 aluminum alloy substrates was obtained without obvious defects after the Tungsten inert gas (TIG) process. Then, a remelt layer (RL) with fine microstructure can be formed by means of a laser remelting (LR) technique of the Ti/Al TIG joints. The Ti–Al intermetallics were produced adhered to the weld joints’ surface, exhibiting the extreme high surface hardness. The micro-hardness distribution of this RL surface was in a range of 1150–1200 HV0.2, which was significantly higher than that of the TC4 titanium alloy substrate. The high micro-hardness of the weld joints’ surface can be mainly ascribed to the actions of the Ti–Al intermetallics, the fine grain and the solid solution strengthening.

Keywords: Tungsten inert gas; lasers; surfaces; titanium alloy (search for similar items in EconPapers)
Date: 2020
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DOI: 10.1142/S0218625X2050016X

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