Enhanced strength of the selective laser melted Al-Mg-Sc-Zr alloy by cold rolling

被引：30

作者：

Ma, Rulong ^{[1
]}

Peng, Chaoqun ^{[1
]}

Cai, Zhiyong ^{[1
,2
]}

Wang, Richu ^{[1
,2
]}

Zhou, Zhaohui ^{[3
]}

Li, Xiaogeng ^{[3
]}

Cao, Xuanyang ^{[3
]}

机构：

[1] Cent South Univ, Sch Mat Sci & Engn, Changsha 410083, Peoples R China

[2] Cent South Univ, Natl Key Lab Sci & Technol Natl Def High Strength, Changsha 410083, Peoples R China

[3] Changsha Adv Mat Ind Res Inst, Changsha 410083, Peoples R China

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2020年 / 775卷

基金：

中国国家自然科学基金; 中国博士后科学基金;

关键词：

Aluminum alloys; Selective laser melting; Cold rolling; Microstructure; Tensile properties; Strengthening mechanism; MECHANICAL-PROPERTIES; ALSI10MG ALLOY; MICROSTRUCTURE; RECRYSTALLIZATION; PRECIPITATION; DEFORMATION; PARTICLES; BEHAVIOR; AL3SC;

D O I：

10.1016/j.msea.2020.138975

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

To further refine the coarse columnar grains (CGs) in selective laser melted (SLMed) alloy, an Al-4.0Mg-0.7Sc-0.4Zr-0.5Mn alloy was fabricated by selective laser melting (SLM) and then subjected to cold rolling and annealing at 300 degrees C for 1 h. Microstructural details and mechanical properties were examined by SEM, EBSD, TEM, and tensile tests. The results show that the microstructure of the SLMed alloy can be further refined by cold rolling. A yield strength of 573 MPa is obtained with an average grain size of 2.4 +/- 1.3 mu m in the CGs areas, a reduction of approximately 30% compared with the as-fabricated alloy. The enhanced strength of the rolled alloy is derived from the refined grains and high density of Al3(Sc, Zr) phase. Additionally, the Al-3(Sc, Zr) particles can enhance the microstructure stability.

引用

页数：9

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