机械工程材料
機械工程材料
궤계공정재료
Materials for Mechanical Engineering
2015年
11期
61-64,87
,共5页
超声辅助搅拌摩擦焊%6061-T6 铝合金%组织%力学性能
超聲輔助攪拌摩抆銲%6061-T6 鋁閤金%組織%力學性能
초성보조교반마찰한%6061-T6 려합금%조직%역학성능
ultrasonic-assisted friction stir welding(UA-FSW)%6061-T6 aluminum alloy%microstructure%mechanical property
对3 mm厚6061-T6铝合金板进行超声辅助搅拌摩擦焊(UA-FSW)，研究了 UA-FSW接头的焊接质量、力学性能、拉伸断口形貌以及焊核区的组织，并与 FSW接头的进行了对比。结果表明：UA-FSW能有效减少焊接缺陷，拓宽焊接工艺窗口；两种接头的显微硬度曲线均呈“W”形，焊核区均呈“洋葱环”特征，但 UA-FSW接头焊核区的“洋葱环”更为流畅；与 FSW接头相比， UA-FSW接头的硬度和拉伸性能更高，断口上的韧窝更多、更深，焊核区的晶粒更小、更均匀。
對3 mm厚6061-T6鋁閤金闆進行超聲輔助攪拌摩抆銲(UA-FSW)，研究瞭 UA-FSW接頭的銲接質量、力學性能、拉伸斷口形貌以及銲覈區的組織，併與 FSW接頭的進行瞭對比。結果錶明：UA-FSW能有效減少銲接缺陷，拓寬銲接工藝窗口；兩種接頭的顯微硬度麯線均呈“W”形，銲覈區均呈“洋蔥環”特徵，但 UA-FSW接頭銲覈區的“洋蔥環”更為流暢；與 FSW接頭相比， UA-FSW接頭的硬度和拉伸性能更高，斷口上的韌窩更多、更深，銲覈區的晶粒更小、更均勻。
대3 mm후6061-T6려합금판진행초성보조교반마찰한(UA-FSW)，연구료 UA-FSW접두적한접질량、역학성능、랍신단구형모이급한핵구적조직，병여 FSW접두적진행료대비。결과표명：UA-FSW능유효감소한접결함，탁관한접공예창구；량충접두적현미경도곡선균정“W”형，한핵구균정“양총배”특정，단 UA-FSW접두한핵구적“양총배”경위류창；여 FSW접두상비， UA-FSW접두적경도화랍신성능경고，단구상적인와경다、경심，한핵구적정립경소、경균균。
Ultrasonic-assisted friction stir welding (UA-FSW)was carried on 6061-T6 aluminum alloy plates with thickness of 3 mm,and the welding quality and mechanical properties of UA-FSW joint were studied,as well as tensile fracture and microstructure of weld nugget zone,and compared with those of FSW joint.The results show that UA-FSW could effectively reduced welding defects and widen welding process window.For the two joint, microhardness curves all exhibited “W”shape,and “onion ring”feature was found in weld nugget zone,but more smooth “onion ring”were obtained in UA-FSW joint.Comparing with FSW joint,UA-FSW joint owned higher microhardness and tensile properties,more and deeper dimples on tensile fracture,and smaller and more uniform grains in weld nugget zone.
