Additively Manufactured Nitrogen-Atomized 17-4 PH Stainless Steel with Mechanical Properties Comparable to Wrought

被引：51

作者：

Lass, Eric A. ^{[1
]}

Stoudt, Mark R. ^{[1
]}

Williams, Maureen E. ^{[1
]}

机构：

[1] NIST, Mat Sci & Engn Div, Mat Measurement Lab, Gaithersburg, MD 20899 USA

来源：

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 2019年 / 50A卷 / 04期

关键词：

HETEROGENEOUS MARTENSITIC NUCLEATION; GENERAL MECHANISM; HEAT-TREATMENT; KINETICS; AUSTENITE; BEHAVIOR;

D O I：

10.1007/s11661-019-05124-0

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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.

引用

页码：1619 / 1624

页数：6

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