Metallurgical Transactions A

, Volume 23, Issue 12, pp 3309–3315 | Cite as

Some aspects of deformation behavior of coarse multiphase metallic materials

  • K. K. Ray
  • D. Mondal
Mechanical Behaviour
Received:

Abstract

The deformation behavior of several single-and two-phase coarse microstructures has been examined using microhardness measurements. It has been found that the strength response of a coarse phase in isolation is distinctly different from its response when it exists in a two-phase system. The second phase alters the mechanical state of the first one andvice versa even in the plastically undeformed condition. This phenomenon is explained in terms of the existence of an appreciable amount of residual stresses in two-phase coarse microstructures. These stresses primarily arise due to the difference in thermal expansion coefficients of the phases. The influence of elastic stress field on microhardness response is shown with a new type of experiment to support the proposed explanation. The present results question the existing expressions for deformation modeling of multiphase materials because of the uncertainties in the estimation of the average strength of the phases in a two-phase system.

Keywords

Ferrite Metallurgical Transaction Pearlite Thermal Expansion Coefficient Duplex Stainless Steel 
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Copyright information

© The Minerals, Metals and Materials Society, and ASM International 1992

Authors and Affiliations

  • K. K. Ray
    • 1
  • D. Mondal
    • 1
  1. 1.Department of Metallurgical EngineeringIndian Institute of TechnologyKharagpurIndia

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