2195铝锂合金氩弧焊接头组织分析及力学性能研究OA北大核心CSTPCD
Study on the Microstructure and Mechanical Properties of 2195 Al-Li Alloy Tungsten Inert Gas Welded Joints
针对T8态2195铝锂合金在氩弧焊焊时接头裂纹敏感性高、接头力学性能差等问题,开展2195铝锂合金焊丝研制工作,对接头的显微组织、抗裂性能及综合力学性能进行了研究.结果表明,2195铝锂合金熔焊接头主要由α-Al、Al2Cu、Al3(Ti,Zr)相组成,具备优异的抗裂性及力学性能,其裂纹敏感性K1＜1％,K2=0％,接头常温抗拉强度约为390 MPa,延伸率为6.3％.BJ-4505焊丝的研制为2195铝锂合金工程应用提供技术支撑.
In response to the high sensitivity of joint cracks and poor mechanical properties of T8 2195 Al-Li alloy during argon arc welding,the development of 2195 Al-Li alloy welding wire was carried out,and the microstructure,crack resistance,and comprehensive mechanical properties of the joint were studied.The results indicate that the 2195 Al-Li alloy fusion welding joint is mainly composed of α-Al,Al2Cu and Al3(Ti,Zr)phases,it has excellent crack resistance and mechanical properties.Its crack sensitivity K1 is less than 1％,K2 is 0％,and the tensile strength of the joint at room temperature is about 390 MPa,and elongation is 6.3％.The development of BJ-4505 welding wire provides technical support for the engineering application of 2195 Al-Li alloy.
温斯涵;焦好军;李启军;李海刚;吕宏军
航天材料及工艺研究所,北京 100076
金属材料
铝锂合金裂纹敏感性接头力学性能微观组织结构件
Al-Li alloyCrack sensitivityJointMechanical propertyMicrostructureStructural component
《宇航材料工艺》 2024 (002)
125-129 / 5
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