Strain induced martensite formation and its effect on strain hardening behavior in the cold drawn 304 austenitic stainless steels

Journal Article · Wed Jan 01 04:00:00 EST 1997 · Scripta Materialia

DOI:https://doi.org/10.1016/S1359-6462(96)00338-7· OSTI ID:417809

Choi, J Y; Jin, W ^[1]

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1. POSCO Technology Research Lab., Pohang (Korea, Republic of). Stainless Steel Research Team

The strain hardening rate of metastable austenitic stainless steels is known to be closely related to the amount of strain induced martensite (SIM, {alpha}{prime}-martensite) formed during deformation. The present investigation was motivated by two main considerations. First, deformation mechanism of {gamma} {yields} a mixture of {epsilon}-martensite and mechanical twinning {yields} {alpha}{prime}-martensite resulting from uniaxial tensile tests at a room temperature for AISI 304 steels. However, little information is available as to whether or not the deformation modes observed under uniaxial tension are valid when the deformation method is changed to wire drawing. Secondly, the effects of a change in deformation method and Cu additions on the amount of {alpha}{prime}-martensite and strain hardening behavior, compared with AISI 304 steel at an equivalent strain under uniaxial tension, have not been clarified. Accordingly, the present investigation was performed to characterize deformation mechanisms producing to {alpha}{prime}-martensite and its effect on the strain hardening behavior in metastable austenitic stainless steels, during a cold drawing process to relatively large strains.

• OSTI ID: 417809
• Journal Information: Scripta Materialia, Journal Name: Scripta Materialia Journal Issue: 1 Vol. 36; ISSN 1359-6462; ISSN SCMAF7
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
AUSTENITE
COLD WORKING
COPPER ADDITIONS
DEFORMATION
MARTENSITE
MICROSTRUCTURE
STACKING FAULTS
STAINLESS STEEL-304
STRAIN HARDENING
TWINNING