Characterization of {gamma}{prime}-Fe{sub 4}N precipitates in a compound layer formed by austenitic nitrocarburizing treatment

Journal Article · Fri Mar 31 23:00:00 EST 1995 · Materials Characterization

DOI:https://doi.org/10.1016/1044-5803(95)00016-X· OSTI ID:49180

Wang, Y; Rong, Y; Chen, X; Hu, G ^[1]

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1. Shanghai Jiao Tong Univ., Shanghai (China). Dept. of Materials Science

The precipitation of {gamma}{prime}-Fe{sub 4}N phase from the {var_epsilon}-matrix in a quenched and aged compound layer of 0.2% C steel formed by austenitic nitrocarburizing treatment has been investigated through transmission electron microscopy. The orientation relationships between the {gamma}{prime} phase and the {var_epsilon} matrix is determined to be {l_brace}0001{r_brace}{sub {var_epsilon}}//{l_brace}111{r_brace}{sub {gamma}{prime}} and <1{bar 2}10>{sub {var_epsilon}}//<011>{sub {gamma}{prime}}. The {gamma}{prime} precipitates appearing in thin plates in the {l_brace}0001{r_brace} planes of {var_epsilon} matrix are sometimes observed to be 180{degree} related to each other. The mechanism of age-hardening in the compound layer is also discussed.

• OSTI ID: 49180
• Journal Information: Materials Characterization, Journal Name: Materials Characterization Journal Issue: 3 Vol. 34; ISSN 1044-5803; ISSN MACHEX
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
AGING
AMMONIA
AUSTENITIC STEELS
CARBURIZATION
CRYSTAL STRUCTURE
INTERMETALLIC COMPOUNDS
METHANOL
MICROSTRUCTURE
NITRIDATION
QUENCHING
SAMPLE PREPARATION
TRANSMISSION ELECTRON MICROSCOPY
WEAR RESISTANCE