Micro friction stir welding of ultra-thin Al-6061 sheets

Micro friction stir welding of ultra-thin Al-6061 sheets
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超薄 Al-6061 板材的微摩擦搅拌焊

DOI:
10.1016/j.jmatprotec.2017.07.031
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发表时间:
2017-12
影响因子:
6.3
通讯作者:
Feng Jicai
Feng Jicai
中科院分区:
材料科学1区
文献类型:
--
作者:
Huang Yongxian;Meng Xiangchen;Zhang Yabin;Cao Jian;Feng Jicai

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对于0.5mm厚的Al-6061薄板,采用微型搅拌摩擦焊进行接头成形,最佳切入深度为0.05mm。转速从1500 rpm提高到2000 rpm有利于良好表面的形成,而三平面锥销比单平面锥销具有更宽的加工窗口。最小减薄率为2%,增加了承载面积。由于剧烈的搅拌作用,锥形销上有三个平面,细化了晶粒,提高了拉伸性能。三面锥销的最大抗拉强度达到217 MPa,相当于母材的90%。
The plunging depth of 0.05 mm was optimum for joint formation of 0.5 mm thick Al-6061 sheet by micro friction stir welding. Increasing rotational velocity from 1500 rpm to 2000 rpm was beneficial to sound surface formation, while the taper pin with three flats owned wider process window than the single taper pin. The minimum ratio of thickness reduction of 2% was attained, which enhanced the area of load bearing. The taper pin with three flats owing to the severe stirring actions resulted in the finer grain size, improving tensile property. The maximum tensile strength by the taper pin with three flats reached 217 MPa, equivalent to 90% of base material.
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