TITLE:
Influence of Martensite Volume Fraction on Mechanical Properties of High-Mn Steel
AUTHORS:
Rashid Khan, Tasneem Pervez, Sayyad Zahid Qamar
KEYWORDS:
Dual-Phase Steel; Martensite; Mechanical Properties; Micromechanical Modeling; Finite Element Method
JOURNAL NAME:
Journal of Minerals and Materials Characterization and Engineering,
Vol.1 No.6,
November
26,
2013
ABSTRACT: Elastic-plastic deformation behavior of austenitic, martensitic, and austenitic-martensitic high-Mn steels is investigated by using crystal plasticity theory. The development of expandable pipes made of two-phase steel for oil and gas well applications is needed for improved and efficient recovery of hydrocarbons from difficult reservoirs. The current research is aimed at improving the down-hole post-expansion material properties of expandable pipes. A mathematical model is first developed based on finite-deformation crystal plasticity theory assuming that slip is the prime mode of plastic deformation. The developed model is then numerically implemented by using the finite element software ABAQUS, through a user defined subroutine. Finite element simulations are performed for austenitic, martensitic, and austenitic-martensitic steels having different proportions of martensite in an austenite matrix. Three primary modes of loading are considered: uniaxial tension, compression and simple shear. The variation in yield strength, hardening pattern and dissipated energy is observed and analyzed.