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Formation and properties of nitrogen‐rich phases in austenitic stainless steel by plasma‐based ion implantation
Author(s) -
Hirosaki Taketo,
Tada Yuki,
Azuma Kingo,
Yatsuzuka Mitsuyasu
Publication year - 2004
Publication title -
electrical engineering in japan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.136
H-Index - 28
eISSN - 1520-6416
pISSN - 0424-7760
DOI - 10.1002/eej.10340
Subject(s) - austenite , materials science , nitrogen , austenitic stainless steel , precipitation , supersaturation , ion , corrosion , penetration depth , metallurgy , plasma , ion implantation , penetration (warfare) , hardness , phase (matter) , analytical chemistry (journal) , microstructure , chemistry , optics , physics , organic chemistry , chromatography , quantum mechanics , operations research , meteorology , engineering
Surface modification of austenitic stainless steel by plasma‐based ion implantation at elevated temperatures below 450°C has been studied experimentally. The nitrogen depth profile at room temperature was similar to that obtained by TRIM code simulation, but the depth of nitrogen penetration increases with target temperature and reaches a few micrometers at a treatment condition of 450°C and an implantation time of 2 h. High‐dose nitrogen implantation exceeding 10 18 cm −2 at temperatures above 350°C results in the formation of expanded austenite phase (supersaturated f.c.c. phase) with little CrN precipitation, leading to remarkable enhancement of surface hardness without loss of corrosion resistance. © 2004 Wiley Periodicals, Inc. Electr Eng Jpn, 148(4): 9–16, 2004; Published online in Wiley InterScience ( www.interscience.wiley.com ). DOI 10.1002/eej.10340