钛含量对激光增材AlSi10Mg合金组织和性能的影响  

Effect of Titanium Content on Structure and Properties of Laser Additive AlSi10Mg Alloy

作　　者：金玉静 陆皓[2] 周宏志 JIN Yujing;LU Hao;ZHOU Hongzhi(Department of Precision Manufacturing Engineering,Suzhou Vocational Institute of Industrial Technology,Suzhou 215104,China;School of Materials Science and Engineering,Shanghai Jiaotong University,Shanghai 200240,China;College of Mechanical Engineering,Hunan Institute of Science and Technology,Yueyang 414006,China)

机构地区：[1]苏州工业职业技术学院精密制造工程系,江苏苏州215104 [2]上海交通大学材料科学与工程学院,上海200240 [3]湖南理工学院机械工程学院,湖南岳阳414006

出　　处：《热加工工艺》2024年第22期69-76,82,共9页Hot Working Technology

基　　金：国家重点研发计划项目(2018YFA0702900);国家自然科学基金项目(52275354);2023年江苏省高校“青蓝工程”资助(苏教师函[2023]27号);2023年江苏省高职院校青年教师企业实践资助(2023QYSJ107);苏州市科技计划项目(SGC2021063);苏州工业职业技术学院自然与社科培育项目(2022kypy11);苏州工业职业技术学院科研启动经费项目(2017kyqd009)。

摘　　要：通过调整钛元素的添加量研究了钛含量对激光选区熔化成形Al Si10Mg合金微观组织和力学性能的影响。结果表明,添加3wt%钛元素使得AlSi10Mg屈服强度和抗拉强度分别提高15%和8.3%。这归因于钛在铝基体中的固溶强化以及形成纳米Al3Ti。快速凝固过程提高了钛在铝基体中的固溶极限,且显著降低了Al3Ti的尺寸。在晶粒内部分布、与基体保持良好共格关系的纳米Al3Ti能够在提高强度的同时保持良好的塑性。但是未完全熔化的钛合金粉末会导致材料的塑性下降。The effect of titanium content on microstructure and mechanical properties of AlSi10Mg alloy formed by laser selective melting was studied by adjusting the amount of titanium.The results show that the addition of 3wt%Ti element increases the yield strength and tensile strength of AlSi10Mg by 15%and 8.3%,respectively.This is attributed to the solid solution strengthening of titanium in the aluminum matrix and the formation of nano Al3Ti.The rapid solidification process increases the solid solution limit of titanium in the aluminum matrix and significantly reduces the size of Al3Ti.Nano Al3Ti,which is distributed within the grains and maintains a good coherent relationship with the matrix,can improve the strength while maintaining good plasticity.However,incomplete melting of titanium alloy powder can lead to a decrease in the plasticity of the material.

关 键 词：激光选区熔化 AlSi10Mg合金 钛含量 纳米Al3Ti 固溶极限 

分 类 号：TG146.21[一般工业技术—材料科学与工程]