Effect of flame heating pass on microstructure and properties of A6N01 aluminum alloy welded joint

作     者：Han Wenfeng Yu Min Fang Xifeng Wei Shubo Zhang Fengdong 韩文峰;余敏;方喜风;魏书波;张风东

作者机构：CRRC Qingdao Sifang Co.Ltd. School of Material Science and EngineeringSouthwest Jiaotong University 

出 版 物：《China Welding》 (中国焊接（英文版）)

年 卷 期：2017年第26卷第1期

页      面：21-28页

学科分类：080503[工学-材料加工工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0802[工学-机械工程] 080201[工学-机械制造及其自动化] 

主　　题：A6N01 welded joint flame straightening microstructure and property Mg2Si precipitation 

摘      要：Flame heating combined with water cooling was used to straighten A6N01 aluminum alloy welded joint and effect of flame heating pass on its microstructure and mechanical properties was studied. Results showed that the flame induced the precipitation and growth of the Mg_2Si phase on the Al substrate for the thermal aging A6N01 aluminum alloy welded joints,thus it led the decrease of micro-hardness and tensile strength of the A6N01 aluminum alloy welded joint with the increase of the heating pass. However,the fatigue property of the flame heated joint was improved because the Mg_2Si precipitation hindered the initiation and propagation of the fatigue crack.