numerical analysis of stress gradient and traps effects on carbon diffusion in aisi 316l during low temperature gas phase carburization
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ID: 144460
2018
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Abstract
In order to elucidate the roles of the composition-induced stress gradient and the traps formed by chromium atoms in carbon diffusion in AISI 316L austenitic stainless steel during low temperature gas phase carburization, the carbon concentration-depth profiles were analyzed by a diffusion model considering the composition-induced stress gradient and the trapping effect. The results show that the carbon concentration-depth profiles calculated by this model show good agreement with the experimental results. The composition-induced compressive stress gradient can enhance the carbon diffusion but reduce the surface carbon concentration; these effects are not pronounced. Carbon atoms prefer to occupy the trap sites, and the detrapping activation energy (Qt = 33 kJ·mol−1) was deduced from fitting the experimental carbon concentration-depth profile. Furthermore, this applied diffusion model can be used to interpret the enhanced carbon diffusion in low temperature carburized AISI 316L.
| Reference Key |
peng2018metalsnumerical
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|---|---|
| Authors | ;Yawei Peng;Jianming Gong;Chaoming Chen;Zhe Liu;Yong Jiang |
| Journal | seminars in cancer biology |
| Year | 2018 |
| DOI |
10.3390/met8040214
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| URL | |
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