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为确定2219—T851和2519—T87铝合金装甲应用于美陆军装甲战车的可行性,曾对两种合金的可焊性进行了预先研究。合金的可焊性是根据焊件的拉伸强度、疲劳极限、抗应力腐蚀裂纹以及抗弹试验来评定的。结果表明,由于2519—T87具有较高的拉伸强度和抗应力腐蚀裂纹性能,故该合金是一种可以替代5083—H131和7039—T64的铝合金装甲材料。 最初的焊件未能满足MIE—STD—1946所规定的抗弹性能要求,但这些试验结果仍是很令人鼓舞的。可以认为,采用新的接头结构设计和改变MIL—STD—1946中规定的临界速度要求,2519—T89铝合金焊件可以表现出足够高的抗弹性能。
To determine the feasibility of the 2219-T851 and 2519-T87 aluminum alloy armor used in the U.S. Army Armored Vehicles, the weldability of both alloys was studied in advance. The weldability of the alloy is based on the tensile strength of the weldment, the fatigue limit, the stress corrosion cracking resistance and the ballistic resistance test. The results show that the 2519-T87 is an alternative to 5083-H131 and 7039-T64 aluminum armor due to its high tensile strength and stress corrosion cracking resistance. The initial weldment failed to meet the anti-ballistic performance requirements of MIE-STD-1946, but the results of these tests are still encouraging. It is believed that the 2519-T89 aluminum alloy weldment exhibits a sufficiently high level of resilience with new joint design and changes to the critical speed requirements specified in MIL-STD-1946.