作者
M Murayama, K Hono, Y Katayama
发表日期
1999/2/1
期刊
Metallurgical and materials transactions A
卷号
30
期号
2
页码范围
345-353
出版商
Springer Boston
简介
The microstructure of 17-4 PH stainless steel at various stages of heat treatment, i.e., after solution heat treatment, tempering at 580 °C, and long-term aging at 400 °C, have been studied by atom probe field ion microscopy (APFIM) and transmission electron microscopy (TEM). The solution-treated specimen consists largely of martensite with a small fraction of δ-ferrite. No precipitates are present in the martensite phase, while spherical fcc-Cu particles are present in the δ-ferrite. After tempering for 4 hours at 580 °C, coherent Cu particles precipitate in the martensite phase. At this stage, the Cr concentration in the martensite phase is still uniform. After 5000 hours aging at 400 °C, the martensite spinodaly decomposes into Fe-rich α and Cr-enriched α′. In addition, fine particles of the G-phase (structure type D8 a , space group Fm m) enriched in Si, Ni, and Mn have been found in intimate …
引用总数
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M Murayama, K Hono, Y Katayama - Metallurgical and Materials Transactions A, 1999
Transformations-Microstructural Evolution in a 17-4 PH Stainless Steel after Aging at 400 (degree) C
M Murayama, Y Katayama, K Hono - Metallurgical and Materials Transactions-Series A, 1999