Mechanical derivation of elastic constants of ε-martensite

Abstract : This work presents direct formulas to compute the HCP elastic constants of ε-martensite from the FCC ones of austenite. The derivation is performed thanks to mechanical compatibility arguments while considering ε-martensite as a laminate structure of twinned and untwinned FCC phases. The formulas are applied to predict the elastic constants of several alloys and very good agreement with measurements is found. According to these relations, directional Young moduli of ε-martensite are most of the time stiffer than the austenite ones and the (0001) shear modulus is always greater than the (111) one, which hardens dislocation glide parallel to the interfaces.
Complete list of metadatas

Cited literature [27 references]  Display  Hide  Download

https://hal.univ-lorraine.fr/hal-02195952
Contributor : Thiebaud Richeton <>
Submitted on : Monday, August 26, 2019 - 11:09:53 AM
Last modification on : Wednesday, August 28, 2019 - 1:19:51 AM

File

 Restricted access
To satisfy the distribution rights of the publisher, the document is embargoed until : 2019-11-16

Please log in to resquest access to the document

Identifiers

Collections

Citation

Thiebaud Richeton. Mechanical derivation of elastic constants of ε-martensite. Scripta Materialia, Elsevier, 2019, 169, pp.14-18. ⟨10.1016/j.scriptamat.2019.04.042⟩. ⟨hal-02195952v2⟩

Share

Metrics

Record views

29