Microstructure Evolution and Mechanical Properties of a Wire-Arc Additive Manufactured Austenitic Stainless Steel: Effect of Processing Parameter.
Microstructure Evolution and Mechanical Properties of a Wire-Arc Additive Manufactured Austenitic Stainless Steel: Effect of Processing Parameter.
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电弧添加剂制造的奥氏体不锈钢的微观结构演变和机械性能：工艺参数的影响
DOI：
10.3390/ma14071681
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发表时间：
2021-03-29
期刊：
影响因子：
--
通讯作者：
Liu Y
中科院分区：
文献类型：
--
作者：
Long P;Wen D;Min J;Zheng Z;Li J;Liu Y
通过基于冷金属转移的电弧增材制造系统沉积了两个线性能量输入 (LEI) 为 219 和 590 J/mm 的单轨多层壁。结合X射线衍射技术、扫描电子显微镜和单轴拉伸试验，分析了LEI和冷却速率（CR）对所研究钢的显微组织演变、力学性能和断裂机制的影响。观察到所研究钢的显微组织主要由δ-铁素体和奥氏体枝晶组成。低CR条件下，δ铁素体-奥氏体界面上形成σ相。同时，初生枝晶间距随着LEI的减小或CR的增加而减小，初生枝晶间距最大为32 μm。随着LEI的降低或CR的增加，断裂伸长率值大致下降，但极限抗拉强度和屈服应力的变化却呈现相反的趋势。此外，所研究的钢在低LEI下的细观损伤主要是由孔隙的合并引起的。而在高LEI下，裂纹是由δ-铁素体周围堆积的位错引起的。
Two single track multi-layer walls with linear energy inputs (LEIs) of 219 and 590 J/mm were deposited by cold metal transfer-based wire arc additive manufacturing system. Combined with the X-ray diffraction technique, scanning electron microscope and uniaxial tensile tests, the influences of LEI and cooling rate (CR) on the microstructure evolution, mechanical properties and fracture mechanisms of the studied steel are analyzed. It is observed that the microstructures of the studied steel are mainly composed of δ-ferrite and austenite dendrites. σ phase is formed on the δferrite–austenite interface under low CR. Meanwhile, the primary dendrites’ spacing decreases with the decrease in LEI or the increase in CR, and the maximal primary dendrites’ spacing is 32 μm. The values of elongation to fracture roughly decline with the decrease in LEI or the increase in CR, but the variations of ultimate tensile strength and yield stress show an opposite trend. In addition, the mesoscopic damages in the studied steel under low LEI are mainly caused by the coalescence of pores. While under high LEI, the cracks are induced by the dislocations piling up around δ-ferrite.
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DOI：
10.3390/ma9080652
发表时间：
2016-08-03
期刊：
Materials (Basel, Switzerland)
影响因子：
--
作者：
Ding D;Pan Z;van Duin S;Li H;Shen C
通讯作者：
Shen C
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影响因子：
3.6
作者：
Lin, Y. C.;Wu, Qiao;He, Dao-Guang
通讯作者：
He, Dao-Guang
影响因子：
11
作者：
Haden, C., V;Zeng, G.;Harlow, D. G.
通讯作者：
Harlow, D. G.
影响因子：
4.7
作者：
Fousova, Michaela;Dvorsky, Drahomir;Vojtech, Dalibor
通讯作者：
Vojtech, Dalibor
高功率直接激光沉积高效增材制造 AISI 316L 不锈钢的显微组织、力学性能和切削加工性研究
DOI：
10.1016/j.jmatprotec.2016.09.005
发表时间：
2017-02-01
影响因子：
6.3
作者：
Guo, Peng;Zou, Bin;Gao, Huabing
通讯作者：
Gao, Huabing