Microstructure and mechanical properties of wire plus arc additively manufactured Al-Mg-Si aluminum alloy

作者：Qi, Zewu; Qi, Bojin^*; Cong, Baoqiang^*; Zhang, Ruize

来源：Materials Letters, 2018, 233: 348-350.

DOI：10.1016/j.matlet.2018.09.048

• Wire plus arc additive manufacturing
• Metals and alloys
• Al-Mg-Si aluminum alloy
• Microstructure
• Mechanical property

Al-3.1Mg-2.0Si ternary aluminum alloy thin wall component was built with double - wire + arc additive manufacturing process by synchronously feeding ER5087 (Al-5Mg) and ER4043 (Al-5Si) wires. The microstructure and mechanical properties were tested and studied. The results showed the main existed phase were alpha-Al, Mg2Si and Al9Si. Al-Mg-Si eutectics (alpha-Al + Mg2Si + Al9Si) distributed along the grain boundary in a-Al matrix. The micro hardness was about 54.7HV. The ultimate tensile strength, yield strength and elongation of the deposit in horizontal direction were 176 MPa, 76.6 MPa and 11.4%, respectively. The properties in vertical direction were slightly lower. An isotropic feature of the tensile properties was exhibited in the deposit.

• 出版日期2018-12-15
• 单位北京航空航天大学