Effect of Zn-brazed-interface on microstructures and mechanical properties of dissimilar 2A12/AZ31 alloys friction stir lap welds

Effect of Zn-brazed-interface on microstructures and mechanical properties of dissimilar 2A12/AZ31 alloys friction stir lap welds
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Zn钎焊界面对异种2A12/AZ31合金搅拌摩擦搭接焊缝显微组织和力学性能的影响

DOI:
10.1016/j.matlet.2019.126543
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发表时间:
2019-11
期刊:
影响因子:
3
通讯作者:
Xie Jilin
Xie Jilin
中科院分区:
材料科学3区
文献类型:
--
作者:
Deng Huaibo;Chen Yuhua;Zhang Timing;Wang Shanlin;Yin Limeng;Xie Jilin

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为了改善Al/Mg异种材料接头的力学性能,在2A 12/AZ 31铝合金搅拌摩擦搭接焊时,在Al/Mg界面添加Zn箔作为钎料。结果表明,钎焊区形成了Mg0.97Zn0.03、Al0.403Zn0.597和MgZn 2等新相,而不是连续的脆性Al 12 Mg 17金属间化合物(IMC)。在375 rpm的旋转速度和30 mm/min的移动速度下,混合接头的拉伸剪切载荷通过Zn钎焊界面达到5.5 kN,从而防止了连续脆性IMC Al 12 Mg 17的形成并扩大了搭接接合面积。
To improve the mechanical behavior of dissimilar Al/Mg joints, Zn foil, as a brazing filler, was added to the Al/Mg interface when conducting friction stir lap welding with 2A12/AZ31 alloys. Results showed that new phases, such as Mg0.97Zn0.03, Al0.403Zn0.597and MgZn2, rather than the continuous brittle Al12Mg17intermetallic compound (IMC), are formed in the brazing area. At a rotation speed of 375 rpm and a travel speed of 30 mm/min, the tensile shear load of the hybrid joint reached 5.5 kN through a Zn-brazed interface, thereby preventing the formation of the continuous brittle IMC Al12Mg17and enlarging the overlap bonding area.
铝与锌夹层热浸渗铝钛合金的搅拌摩擦点焊-钎焊
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