首页|激光粉末床熔融成形高性能Al-Mn-Mg-Sc-Zr合金的显微组织演变及力学性能

激光粉末床熔融成形高性能Al-Mn-Mg-Sc-Zr合金的显微组织演变及力学性能

扫码查看
原文链接
  • 万方数据
  • 维普
系统研究时效温度对激光粉末床熔融成形Al-Mn-Mg-Sc-Zr合金显微组织及力学性能的影响.结果表明,成形态合金组织致密且无裂纹,平均晶粒尺寸为3.51 μm,屈服强度为(547±3)MPa.经300 ℃时效后,合金组织中析出大量尺寸为2～3 nm且与基体共格的Al3Sc纳米颗粒.时效样品的屈服强度提升至(616±4)MPa,这得益于合金中的析出强化、固溶强化和晶界强化.当时效温度超过300 ℃时,部分Mn和Zr从固溶体中析出,形成Al6Mn和Al3(Sc,Zr)相.经500 ℃时效后,合金中Al6Mn相和Al3(Sc,Zr)相分别粗化至约600和30 nm.因此,合金的屈服强度下降至(372±3)MPa.
Micro structure evolution and mechanical properties of high-performance Al-Mn-Mg-Sc-Zr alloy fabricated by laser powder bed fusion
The influence of aging temperatures on the microstructure and mechanical properties of an Al-Mn-Mg-Sc-Zr alloy prepared by laser powder bed fusion(L-PBF)was systematically studied.The results show that the fabricated alloy was a dense and crack-free piece with a fine grain size of 3.51 pm and a yield strength of(547±3)MPa.When the alloy was subjected to aging at 300 ℃,a large amount of highly coherent Al3Sc nanoparticles(2-3 nm)precipitated from the Al matrix.The aged sample exhibited a high yield strength of(616±4)MPa,which can be attributed to precipitation strengthening,solid solution strengthening,and grain boundary strengthening.When the alloy was aged at a temperature higher than 300 ℃,part of the dissolved Mn and Zr precipitated in the form of Al6Mn and Al3(Sc,Zr).When the alloy was aged at 500 ℃,the Al6Mn and Al3(Sc,Zr)precipitates grew to approximately 600 and 30 nm,respectively,in size.Consequently,the yield strength of the alloy decreased to(372±3)MPa.

laser powder bed fusionAl-Mn-Mg-Sc-Zr alloymicrostructure evolutionmechanical propertiesAl3Sc nanoparticle

唐浩、耿遥祥、高超峰、席晓莹、张建涛、肖志瑜

展开 >

华南理工大学国家金属材料近净成形工程技术研究中心,广州 510640

江苏科技大学材料科学与工程学院,镇江 212003

季华实验室先进增材制造研究所,佛山 528200

激光粉末床熔融 Al-Mn-Mg-Sc-Zr合金 显微组织演变 力学性能 Al3Sc纳米颗粒

国家自然科学基金国家自然科学基金Guangdong Basic Applied Basic Research Foundation,ChinaGuangdong Basic Applied Basic Research Foundation,ChinaGuangdong Basic Applied Basic Research Foundation,China

52001140522743632022A15150105582022A15150115972022A1515240065

2024

10.1016/S1003-6326(24)66480-0

中国有色金属学报(英文版)
中国有色金属学会

中国有色金属学报(英文版)

CSTPCD
影响因子：1.183
ISSN：1003-6326
年,卷(期)：2024.34(5)