na对al—mg—li合金焊缝金属韧性的影响
Keywords: al-mg—li合金,na含量,焊缝金属脆化
Abstract:
？研究了tig焊接时微量杂质元素na对01420al-mg-li合金焊缝金属力学性能的影响.na含量小于20μg/g时,焊缝金属不发生脆化,含量达到50μg/g时,焊缝强度稍有下降,塑性急剧降低用电子探针分析发现na在焊缝枝晶界偏聚.
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