Laser powder bed fusion of Zr-modified Al-Cu-Mg alloy:Processability and elevated-temperature mechanical properties
作者机构：State Key Laboratory of Solidification ProcessingNorthwestern Polytechnical UniversityXi’an 710072China Key Laboratory of Metal High Performance Additive Manufacturing and Innovative DesignMIIT ChinaNorthwestern Polytechnical UniversityXi’an 710072China
出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)
年 卷 期：2023年第136卷第5期
页 面：223-235页
核心收录：
学科分类：080503[工学-材料加工工程] 08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0802[工学-机械工程] 080201[工学-机械制造及其自动化]
基 金：The work was financially supported by the National Key R&D Program of China(No.2016YFB1100100) the Research Fund of the State Key Laboratory of Solidification Processing(NPU),China(No.2020-TZ-02) the Advance Research Projects in the Field of Manned Spaceflight(No.040302) the Shanghai Aerospace Science and Technology Innovation Fund Project(No.SAST2018-066) This work was also supported by the“Fundamental Research Funds for the Central Universities”(No.G2021KY05104) the“Natural Science Basis Research Plan in Shaanxi Province of China”(No.2022JQ-479).We would like to thank Editage(www.editage.com)for En-glish language editing
主 题：Laser powder bed fusion Zirconium Al-Cu-Mg alloy Processability Elevated-temperature mechanical property
摘 要：Zr modification is an effective method for improving hot-cracking resistance and elevated-temperature mechanical properties during laser powder bed fusion(L-PBF)of traditional medium and high strength wrought aluminum *** study investigated the l-PBF processability and elevated-temperature mechanical properties of a Zr-modified 2024Al *** was found that the hot-cracking susceptibility increased with the increased scanning speed,which was in reasonable agreement with the modified Rappaz-Drezet-Gremaud ***,the primary L1_(2)-Al_(3)Zr precipitates,which acted as ef-ficient nucleation sites,precipitated at the fusion boundary of the melt pool,leading to the formation of a heterogeneous grain *** yield strength(YS)of the as-fabricated samples at 150,250,and 350℃was 363,210,and 48 MPa,*** the slight decrease to 360 MPa of the YS when tested at 150℃,owing to the additional precipitate strengthening from the L1_(2)-Al_(3)Zr precipitates,the YS achieved yield strengths of 253 and 69 MPa,an increase of 20.5%and 30.4%,when tested at 250 and 350℃,*** yield strengths in both the as-fabricated and T6-treated conditions tested at 150 and 250℃were comparable to those of casting Al-Cu-Mg-Ag alloys and superior to those of traditionally heat-resistant 2219-T6 and 2618-T6 of Al-Cu alloys.
维普期刊数据库