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

被引：92
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
收藏
页码：65 / 69
页数：5
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