Strength of mixtures of bainite and martensite
作者:
Youngc. H.,
BhadeshiaH. K. D. H.,
期刊:
Materials Science and Technology
(Taylor Available online 1994)
卷期:
Volume 10,
issue 3
页码: 209-214
ISSN:0267-0836
年代: 1994
DOI:10.1179/mst.1994.10.3.209
出版商: Taylor&Francis
数据来源: Taylor
摘要:
AbstractRecently published experimental data demonstrate that the strength of mixed microstructures of tempered bainite and martensite can peak at an intermediate volume fraction of martensite. In the present work, a quantitative interpretation of these observations is achieved by modelling the mechanical properties of bainite and martensite in their tempered states. It is found that the peak in the curve of the strength as a function of the volume fraction of martensite can be attributed to two factors. When bainite forms it enriches the residual austenite with carbon, so that the strength of the subsequent martensite increases. In addition, during its deformation, the strength of the bainite is enhanced via plastic constraint by the surrounding stronger martensite. Taking these effects into account, it is possible to predict accurately both the trends and the absolute values of published experimental data on the strength of mixed microstructures.MST/1901
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