| 王敏， 邢彦锋， 曹菊勇， 杨夫勇， 张小兵.磁场约束对CMT增材制造铝合金微观组织及力学性能的影响[J].轻工机械,2022,40(6):27-32 |
| 磁场约束对CMT增材制造铝合金微观组织及力学性能的影响 |
| Effect of Magnetic Field Constraint on Microstructure and Mechanical Properties of CMT Additive Manufacturing Aluminum Alloy |
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| DOI：10.3969/j.issn.1005 2895.2022.06.005 |
| 中文关键词: 电弧增材制造 纵向直流磁场 热影响区HAZ 韧性断裂 |
| 英文关键词:WAAM（Wire and Arc Additive Manufacturing） longitudinal DC magnetic field HAZ（Heat Affected Zone） ductile fracture |
| 基金项目:上海市自然科学基金项目：高强度钢 铝合金 CMT 焊缝热塑性变形及偏差传递机理研究（20ZR1422600）。 |
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| 中文摘要: |
| 为了解决电弧增材制造铝合金过程中出现的气孔和微观组织缺陷问题，课题组采用了纵向直流磁场来辅助电弧增材制造铝合金的方法，研究了纵向直流磁场对成形件的焊缝气孔、组织形貌和力学性能的影响。结果表明：纵向直流磁场可以降低增材制造铝合金成形件的孔隙率，改变熔合线的形貌，细化铝合金内部的微观组织；施加了纵向直流磁场辅助电弧增材制造铝合金的成形件，横向和纵向极限抗拉强度分别达到了176.5和182.9 MPa，相比于无磁场条件下提升了9.3%和14.4%，组织性能明显优于无磁场条件下的成形件；施加了磁场后的成形件拉伸断口表面气孔数较无磁场下明显减少，断口形貌呈韧性断裂。 |
| 英文摘要: |
| In order to solve the problems of pores and microstructure defects in the arc additive manufacturing of aluminum alloys, a longitudinal DC magnetic field to assist the arc additive manufacturing of aluminum alloys was used to study the effects of the longitudinal DC magnetic field on the weld porosity, tissue morphology and mechanical properties of the formed parts. The results show that the longitudinal DC magnetic field can reduce the porosity, change the morphology of the fusion line, and refine the microstructure inside the aluminum alloy; the transverse and longitudinal ultimate tensile strengths of the formed parts with the longitudinal DC magnetic field assisted arc additive manufacturing aluminum alloy reach 176.5 and 182.9 MPa, respectively, compared with the condition without the magnetic field. The tensile strengths of the formed parts with the magnetic field were significantly better than those of the formed parts without the magnetic field by 9.3% and 14.4%. The number of pores on the tensile fracture surface of the formed parts after the application of magnetic field was significantly reduced compared with that without magnetic field, and the fracture morphology was ductile fracture." |
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