Entropy modeling on serrated flows in carburized steels

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

20 Scopus Citations
View graph of relations

Author(s)

  • Jamieson Brechtl
  • Bilin Chen
  • Xie Xie
  • Jimmy D. Venable
  • Peter K. Liaw
  • Steven J. Zinkle

Detail(s)

Original languageEnglish
Pages (from-to)135-145
Journal / PublicationMaterials Science and Engineering A
Volume753
Publication statusPublished - 10 Apr 2019
Externally publishedYes

Abstract

Samples comprised of carburized steel alloys, 4615, 4720, and 10B22, were tension tested at room temperature and at a strain rate of 2 × 10 −4 s −1 . The serrated-flow behavior was modeled and analyzed, using the refined composite multiscale entropy (RCMSE) method. High energy X-ray diffraction revealed the body-centered-cubic (BCC) structure of the three alloys in the as-received condition. Moreover, Vickers-hardness experiments were performed, which showed an increase in the hardness of the alloy that corresponded to increasing impurity concentrations. Here the diffusion coefficient of carbon in the three alloys were estimated, respectively, to be 2.5 × 10 −11 m 2 /s, 5.1 × 10 −11 m 2 /s, and 2.8 × 10 −11 m 2 /s for alloys, 10B22, 4615, and 4720, respectively, which agree with the values found in the literature for α-iron. Moreover, the sample entropy, on average, increased with respect to the heating time, and, consequently, the amount of carbon that had diffused into the alloy. The above results show that the complexity of the serration behavior in the alloys studied increases with respect to the amount of carbon that has diffused into the material.

Research Area(s)

  • Hardness, Iron alloys, Modeling/simulations, Plasticity, Stress/strain measurements

Bibliographic Note

Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to lbscholars@cityu.edu.hk.

Citation Format(s)

Entropy modeling on serrated flows in carburized steels. / Brechtl, Jamieson; Chen, Bilin; Xie, Xie et al.
In: Materials Science and Engineering A, Vol. 753, 10.04.2019, p. 135-145.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review