Additively Manufactured Nitrogen-Atomized 17-4 PH Stainless Steel with Mechanical Properties Comparable to Wrought
Additively Manufactured Nitrogen-Atomized 17-4 PH Stainless Steel with Mechanical Properties Comparable to Wrought
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DOI：
10.1007/s11661-019-05124-0
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发表时间：
2019-04-01
影响因子：
2.8
通讯作者：
Williams, Maureen E.
中科院分区：
文献类型：
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作者：
Lass, Eric A.;Stoudt, Mark R.;Williams, Maureen E.
在1323K（1050℃）固溶退火后，增材制造（AM）氮雾化17-4的显微组织中含有12 +/- 4%的残余奥氏体，其屈服强度约为变形后的一半，其中含有接近100%的BCC/马氏体。在1273 K（1000℃）而不是1323K（1050℃）固溶时，AM17-4的马氏体体积分数接近95%，其中更多的氮被捕获为M（C，N）碳化物，然后进一步冷却到233K（-40℃）。这种替代解决方案将AM材料的屈服强度恢复到其锻造材料的90%，这是在实际应用中实现AM17-4的关键的第一步。
The microstructure of additively manufactured (AM) nitrogen-atomized 17-4 contains 12 +/- 4pct retained austenite after conventional solutionization annealing at 1323K (1050 degrees C) resulting in a yield strength of about half that of wrought, which contains approximate to 100pct BCC/martensite. An AM17-4 microstructure containing a volume fraction of approximate to 95pct martensite is achieved by solutionizing at 1273 K(1000 degrees C) instead of 1323K (1050 degrees C), where more nitrogen is trapped as M(C,N)-carbides, followed by further cooling to 233K (-40 degrees C). This alternative solutionization recovers the yield strength of the AM material to >90pct of its wrought counterpart, a critical first step toward the implementation of AM17-4 in real-world applications.