粉末冶金技术2026，Vol.44Issue(3)：340-351,12.DOI:10.19591/j.cnki.cn11-1974/tf.2026010002
激光粉末床熔融成形Al-Si-Fe-Mn-Ni-Sc-Zr合金的组织形貌及腐蚀行为
Microstructure and corrosion behavior of Al-Si-Fe-Mn-Ni-Sc-Zr alloy processed by laser powder bed fusion
郝宇 1张利 1杨晓辉 2仪登豪 1苏辉 1李晓峰1
作者信息
- 1. 中北大学材料科学与工程学院,太原 030051
- 2. 太原科技大学分析测试中心,太原 030024
- 折叠
摘要
Abstract
To investigate the effects of adding different mass fractions of Al-Mg-Sc-Zr alloys on the microstructure and corrosion behavior of Al-Si alloy formed by powder bed fusion-laser beam(PBF-LB),10％,20％,and 30％mass fractions of Al-Mg-Sc-Zr powders were added to the Al-Si-Fe-Mn-Ni(ASF)alloy powder.The ASF-M cross-over alloy was fabricated through powder bed fusion-laser beam technology,and the microstructure and corrosion resistance of the ASF-M alloy were compared and analyzed.The results show that adding an appropriate amount of Al-Mg-Sc-Zr alloy can effectively inhibit the growth of grains in the equiaxed zone and columnar zone of the ASF-M alloy,refine the α-Al grains and Si network structure in the equiaxed zone,and reduce the size of Si particles in the columnar zone(10～100 nm).The electrochemical test results show that the ASF-M10 alloy exhibits higher impedance,lower corrosion current density,and superior pitting resistance compared to the ASF-M0 alloy;while the corrosion resistance of the ASF-M20 and ASF-M30 alloys is slightly lower than that of the ASF-M0 alloy.The analysis of immersion corrosion morphology indicates that with the addition of Al-Mg-Sc-Zr alloy,the interlayer corrosion of the continuous layer of ASF-M alloy is inhibited,and a few pitting corrosion pits appear;this is mainly because the refined Si reticular structure can effectively inhibit galvanic corrosion,and at the same time,the Mg element can play a role in stabilizing the oxide film.关键词
激光粉末床熔融/交叉合金/组织演变/电化学腐蚀性能/腐蚀机理Key words
powder bed fusion-laser beam/cross-over alloy/microstructural evolution/electrochemical corrosion properties/corrosion mechanism分类
矿业与冶金引用本文复制引用
郝宇,张利,杨晓辉,仪登豪,苏辉,李晓峰..激光粉末床熔融成形Al-Si-Fe-Mn-Ni-Sc-Zr合金的组织形貌及腐蚀行为[J].粉末冶金技术,2026,44(3):340-351,12.
