Effects of weld reinforcement on tensile behavior and mechanical properties of 2219-T87 aluminum alloy TIG welded joints

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• 作者：Guo-qing WANG^a ; Quan LI^b ; Yan-jun LI^c ; ^d ; Ai-ping WU^c ; ^d ; ^{wuaip@tsinghua.edu.cn} ; Nin-xu MA^e ; Dong-yang YAN^a ; Hui-qiang WU^a
• 关键词：tensile strength ; weld reinforcement ; 2219-T87 aluminum alloy ; TIG welding ; digital image correlation (DIC) technique
• 刊名：Transactions of Nonferrous Metals Society of China
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：27
• 期：1
• 页码：10-16
• 全文大小：2071 K
• 卷排序：27

文摘

Tungsten inert gas (TIG) welded joints for 2219-T87 aluminum alloy are often used in the fuel tanks of large launch vehicles. Because of the massive loads these vehicles carry, dealing with weld reinforcement on TIG joints represents an important issue in their manufacturing and strength evaluation. Experimental and numerical simulation methods were used to investigate the effects of weld toe shape and weld toe position on the tensile behavior and mechanical properties of these joints. The simulation results indicated that the relative difference in elongation could be as large as 96.9% caused by the difference in weld toe shape. The joints with weld toes located in the weld metal or in the partially melted zone (PMZ) exhibited larger elongation than joints with weld toes located at the juncture of the weld metal and the PMZ.