摘要
通过选区激光熔化(SLM)技术制备Al-Mg-Sc-Zr铝合金,系统研究了不同工艺参数对铝合金粉末成形性以及不同时效处理条件对SLM成形样品组织和力学性能的影响。结果表明,在高激光功率和低激光扫描速度下,SLM成形样品的致密度较高。沿样品沉积方向可观察到熔池层层堆叠的显微组织,熔池边界和熔池内部均存在细小纳米颗粒。经不同温度时效处理后,样品的硬度和压缩屈服强度先增加后降低。SLM成形样品经400℃时效处理3h后屈服强度达到最大值(469±4)MPa。
Al-Mg-Sc-Zr aluminum alloy was prepared by selective laser melting(SLM).The effects of different processing parameters on the formation and that of different aging conditions on mechanical properties of SLM-formed samples were investigated.The results show that the high density samples can be obtained at a high laser power and a low laser scanning speed.The layer-by-layer stacking of the molten pool can be observed along the deposition direction of the sample.The nanoparticles are observed at both the inside and boundary of molten pool.After aging treatment at different temperatures,the hardness and compressive yield strength of the sample first increase and then decrease.The maximum yield strength of(469±4)MPa is achieved after the sample is aged at 400℃for 3 h.
作者
陈金汉
耿遥祥
侯裕
唐浩
罗金杰
喻利花
许俊华
鞠洪博
Chen Jinhan;Geng Yaoxiang;Hou Yu;Tang Hao;Luo Jinjie;Yu Lihua;Xu Junhua;Ju Hongbo(Jiangsu University of Science and Technology,Zhenjiang 212003,China)
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2020年第11期3882-3889,共8页
Rare Metal Materials and Engineering
基金
国家重点研发计划项目(2016YFB1100103)
江苏省自然科学基金青年基金项目(BK20180985)
江苏省高等学校自然科学研究面上项目(18KJB430011)。
作者简介
陈金汉,男,1995年生,硕士生,江苏科技大学材料科学与工程学院,江苏镇江212003,E-mail:563133281@qq.com。
