CAJ | 학술논문

通过试验测定了2219-T87母材及VPTIG焊接接头在不同温度下的力学性能，并对母材和焊接接头的微观组织及断口形貌进行了观察和分析，讨论了温度对母材及焊接接头性能的影响。试验结果表明，2219-T87铝合金有低温增强现象，比较适合低温状态下的工作。但与母材相比，焊接接头的各项力学性能均有所下降。
통과시험측정료2219-T87모재급VPTIG한접접두재불동온도하적역학성능，병대모재화한접접두적미관조직급단구형모진행료관찰화분석，토론료온도대모재급한접접두성능적영향。시험결과표명，2219-T87려합금유저온증강현상，비교괄합저온상태하적공작。단여모재상비，한접접두적각항역학성능균유소하강。
The mechanical properties of 2219-T87 aluminum alloy base metal and its TIG welded joint are tested under different test temperatures. The micro-structures and the fractography of base metal and the TIG welded joint are observed and analyzed. The effect of test temperature on mechanical properties is discussed. The results indicate that the mechanical property of 2219-T87 base metal will increase under cryogenic temperature, suit-able for service at cryogenic temperature. Contrasting with property of base metal, the mechanical property of TIG welded joint is lower.