摘要
对AZ31镁合金进行搅拌摩擦加工(Friction stir processing,FSP),并对母材(Basal material,BM)和FSP试样进行碱热处理(Alkali heat treatment,AHT),研究了AHT对搅拌摩擦加工后AZ31镁合金微观组织和耐腐蚀性能的影响。结果表明,FSP可以显著细化晶粒,平均晶粒尺寸由BM的12.8μm细化至FSP后的3.1μm,高角度晶界比例从BM的75.9%降低至FSP后的45.3%,晶界亚结构增多。AHT使材料表面形成致密的MgO和Al_(2)O_(3)混合涂层,有效地提高了AZ31镁合金的耐浸泡腐蚀性能。
Friction stir processing(FSP)was performed on AZ31 magnesium alloy,and alkali heat treatment(AHT)was performed on the basal material(BM)and FSPed specimens.The effect of AHT on microstructure and corrosion resistance of the friction stir processed AZ31 magnesium alloy was studied.The results show that the FSP can significantly refine the grains,the average grain size is decreased from 12.8μm of BM to 3.1μm after FSP,the proportion of high angle grain boundaries decreased from 75.9% of BM to 45.3% after FSP,and the grain boundary substructure is increased.The AHT induces the material to form a dense MgO and Al_(2)O_(3) mixed coating on the surface,which effectively improves the immersion corrosion resistance of the AZ31 magnesium alloy.
作者
陈善勇
王快社
乔柯
王文
Chen Shanyong;Wang Kuaishe;Qiao Ke;Wang Wen(School of Metallurgical Engineering,Xi'an University of Architecture and Technology,Xi'an Shaanxi 710055,China;National and Local Joint Engineering Research Center for Functional Materials Processing,Xi'an University of Architecture and Technology,Xi'an Shaanxi 710055,China)
出处
《金属热处理》
CAS
CSCD
北大核心
2022年第3期61-66,共6页
Heat Treatment of Metals
基金
国家自然科学基金(U1760201,52034005,51974220)
陕西省自然科学基金(2019JQ-769)
陕西省工业重点攻关项目(2020ZDLGY13-06)。
关键词
AZ31镁合金
搅拌摩擦加工
微观组织
碱热处理
腐蚀
AZ31 magnesium alloy
friction stir processing
microstructure
alkali heat treatment
corrosion
