Mechanical properties of FSW joint of 2219 aluminum alloy at low temperature

DING Yansong; QU Wenqing; LI Laiping

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Mechanical properties of FSW joint of 2219 aluminum alloy at low temperature
Vol. 49, Issue 1, Pages: 85-88(2019)
DOI：

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DING Yansong, QU Wenqing, LI Laiping. Mechanical properties of FSW joint of 2219 aluminum alloy at low temperature. [J]. 49(1):85-88(2019)
DOI：

DING Yansong, QU Wenqing, LI Laiping. Mechanical properties of FSW joint of 2219 aluminum alloy at low temperature. [J]. 49(1):85-88(2019) DOI：

摘要

2219铝合金广泛应用于运载火箭推进剂贮箱中,但其气孔敏感性较强,而搅拌摩擦焊是固相连接技术,不仅可以降低2219铝合金的气孔敏感性,还可以提高其焊接接头强度系数,是适合于2219铝合金的焊接工艺。分析-183℃、-120℃下2219铝合金母材和FSW接头的力学性能和断口,并与室温下的力学性能和断口进行对比。结果表明:2219铝合金母材和FSW接头的低温力学性能优于室温。

Abstract

The 2219 aluminum alloy is widely used in the carrier rocket propellant storage tank,but the sensitivity of its gas pore is strong.Friction stir welding is a solid-phase joining technology,which can not only reduce the gas pore sensitivity of 2219 aluminum alloy,but also improve the strength coefficient of welded joint. It is a suitable welding technology for 2219 aluminum alloy. The mechanical properties and fractures of 2219 aluminum alloy base metal and FSW joints at-183 °C and-120 °C are analyzed and compared with those at room temperature. The results show that the mechanical properties of 2219 aluminum alloy base material and FSW joint at low temperature are better than those at room temperature.