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三層復(fù)合板鋁/鎂合金/鋁FSW接頭的微觀組織與抗拉強(qiáng)度
作者:
作者單位:

太原科技大學(xué) 材料科學(xué)與工程學(xué)院

作者簡(jiǎn)介:

通訊作者:

中圖分類號(hào):

TG 406

基金項(xiàng)目:

山西省重點(diǎn)研發(fā)計(jì)劃（高新技術(shù)領(lǐng)域）（201903D121054）；NSFC-山西煤基低碳聯(lián)合基金（重點(diǎn)支持項(xiàng)目）（U1910213）；山西省高等學(xué)校科技創(chuàng)新項(xiàng)目（2019L0621）


Microstructure and Tensile Strength of Aluminum/Magnesium Alloy/Aluminum FSW Joint of Three-Layer Composites
Author:
Affiliation:

1.School of Materials Science and Engineering, Taiyuan University of Science and Technology;2.Taiyuan University of Science and Technology

Fund Project:

Shanxi Province Key R&D Program Project (High-tech Field) (201903D121054); Shanxi Province Higher Education Science and Technology Innovation Project (2019L0621)

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    摘要:

    摘 要:在不同焊接速度下進(jìn)行了三層復(fù)合板Al/AZ31/Al 攪拌摩擦焊接（FSW）工藝試驗(yàn)，并觀察分析其接頭成形顯微組織和拉伸性能。結(jié)果顯示：在實(shí)驗(yàn)優(yōu)化的工藝參數(shù)下，焊縫接頭成形較好，其內(nèi)部呈層狀分布且未發(fā)現(xiàn)缺陷；焊核區(qū)（NZ）晶粒細(xì)化明顯，大角晶界（HAGBs）和再結(jié)晶晶粒占比達(dá)80%；在焊縫前進(jìn)側(cè)帶狀組織區(qū)（BS）和鎂、鋁界面處存在金屬間化合物（IMC），主要為Al3Mg2和Al12Mg17；隨焊速的增加，焊接接頭的抗拉強(qiáng)度先增大后減小，在v=100 mm/min時(shí)焊核區(qū)鋁層晶粒平均尺寸為1.75 μm，接頭抗拉強(qiáng)度達(dá)到最大87.3 MPa，是母材的50.8%。

    Abstract:

    Abstract: The friction stir welding (FSW) process tests of three-layer composite plate Al/AZ31/Al at different welding speeds were carried out, and the joint forming, microstructure and tensile properties were observed and analyzed. The results show that under the optimized process parameters, the welded joint is well formed, and its internal distribution is layered, and no defects are found. The grain refinement in nugget zone (NZ) is obvious, and the large angle grain boundaries (HAGBs) and recrystallized grains account for 80%. There is intermetallic compound (IMC) in the banded structure area (BS) on the forward side of the weld and the interface between magnesium and aluminum, which is mainly composed of Al3Mg2 and Al12Mg17. With the increase of welding speed, the tensile strength of welded joint first increases and then decreases. When v=100 mm/min, the average grain size of the aluminum layer in the weld nugget area is 1.75 μm, and the tensile strength of the welded joint reaches the maximum 87.3 MPa, which is 50.8% of the base metal.

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引用本文

趙菲,王康.三層復(fù)合板鋁/鎂合金/鋁FSW接頭的微觀組織與抗拉強(qiáng)度[J].稀有金屬材料與工程,2022,51(3):1047~1054.[Zhao Fei, Wang kang. Microstructure and Tensile Strength of Aluminum/Magnesium Alloy/Aluminum FSW Joint of Three-Layer Composites[J]. Rare Metal Materials and Engineering,2022,51(3):1047~1054.]
DOI：10.12442/j. issn.1002-185X.20210899

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  • 收稿日期:2021-10-17
  • 最后修改日期:2021-12-13
  • 錄用日期:2022-01-28
  • 在線發(fā)布日期: 2022-04-06
  • 出版日期: 2022-03-30