Enhancement of an additive-manufactured austenitic stainless steel by post-manufacture heat-treatment

被引：101

作者：

Chen, Nan ^{[1
]}

Ma, Guoqiang ^{[1
]}

Zhu, Wanquan ^{[1
]}

Godfrey, Andrew ^{[2
]}

Shen, Zhijian ^{[3
]}

Wu, Guilin ^{[1
]}

Huang, Xiaoxu ^{[1
,4
]}

机构：

[1] Chongqing Univ, Coll Mat Sci & Engn, Int Joint Lab Light Alloys MOE, Chongqing 400044, Peoples R China

[2] Tsinghua Univ, Sch Mat Sci & Engn, Lab Adv Mat MOE, Beijing 100084, Peoples R China

[3] Stockholm Univ, Arrhenius Lab, Dept Mat & Environm Chem, S-10691 Stockholm, Sweden

[4] Tech Univ Denmark, Dept Mech Engn, DK-2800 Lyngby, Denmark

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2019年 / 759卷

基金：

中国国家自然科学基金;

关键词：

Additive manufacturing; 316L stainless steel; Heat-treatment; Mechanical properties; Orowan strengthening; 316L; STRENGTH; NETWORK;

D O I：

10.1016/j.msea.2019.04.111

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The effect of post-manufacture heat-treatment on the mechanical strength of an additively-manufactured austenitic stainless steel has been investigated. Microstructural investigations revealed that the as-manufactured material exhibited a multi-scale structure, composed of grains, cells, dislocations and nano-sized particles. Annealing at 400 degrees C resulted in a 10% increase in yield strength, associated with the additional precipitation of a population of nano-sized silicates. Annealing at higher temperatures resulted in a decrease in strength, attributed primarily to the thermal instability of the cell structure in the as-manufactured material. The results demonstrate that by careful control of annealing conditions the structure and mechanical properties of additively-manufactured austenitic stainless steel can be optimized by post-manufacture heat-treatment.

引用

页码：65 / 69

页数：5

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