Numéro |
J. Phys. IV France
Volume 112, October 2003
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Page(s) | 267 - 270 | |
DOI | https://doi.org/10.1051/jp4:2003880 |
J. Phys. IV France 112 (2003) 267
DOI: 10.1051/jp4:2003880
Evaluation of matrix strength of Fe-C as-quenched and quench-tempered martensite using nanoindentation techniques
T. Ohmura and K. TsuzakiSteel Research Center, National lnstitute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan
Abstract
Evaluation of the matrix strength of the Fe-C martensite is performed by nanoindentation techniques. As-quenched martensite
was examined for five kinds of Fe-C alloys with various carbon contents in the range of 0.1 to 0.8 mass% while quench-tempered
martensite was investigated for an Fe-0.4%C attoy. The nanohardness attributed to the matrix strength increases with the carbon
content, and decreases with increasing tempering temperature. The ratio of the nanohardness to the macrohardness,
, was much smaller for the Fe-C martensite than those for the single crystals, indicating that there is a significant grain
size effect for the martensite.
© EDP Sciences 2003