Transactions of Materials and Heat Treatment

Title：Influence of preheating on properties of self-piercing riveting for TA1 titanium alloy

Authors： Huang Zhichao Xiao Rui Liu Shuaihong Zhou Zejie Lai Jiamei

Unit： East China Jiaotong University Nanchang University

KeyWords： preheating titanium alloy self-piercing riveting static strength energy absorption value

ClassificationCode：TG386

year,vol(issue):pagenumber：2020,45(6):80-85

Abstract：

In order to explore the influence of temperature on the self-piercing riveting properties of TA1 titanium alloy, the self-piercing riveting test was conducted under the preheating condition by three combinations of titanium/titanium(TA1+TA1), titanium/aluminum (TA1+5052) and aluminum/titanium(5052+TA1), and the forming sections and tensile failure forms of the joints under the three preheating temperatures of 20, 100 and 150 ℃ were observed by the static tensile test on the joint. The results show that the forming sections of the self-piercing riveting joints are different under different sheet metal combinations, and the bottom thickness of the forming section decreases with the increasing of preheating temperature. At the same temperature, the static strength of TA1+TA1 joint is the highest, and the upper sheet is pulled out and fails. TA1+5052 is the second, and the lower sheet is broken. 5052+TA1 is the lowest, and the upper sheet is broken. With the increasing of preheating temperature, the static strength of the three joints decreases obviously, but the failure mode does not change significantly. However, in terms of energy absorption value, TA1+TA1 joint decreases gradually, TA1+5052 and 5052+TA1 joint increases gradually.

Funds：

国家自然科学基金资助项目（51875201，51565014）

黄志超(1971-)，男，博士，教授 E-mail：hzcosu@163.com

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