Tensile deformation behavior of mechanically stabilized Fe-Mn austenite

Journal Article · Wed Jun 01 00:00:00 EDT 1988 · Metall. Trans., A; (United States)

DOI:https://doi.org/10.1007/BF02674030· OSTI ID:6628707

Tomota, Y; Strum, M; Morris, Jr, J W

The tensile deformation behavior of mechanically-stabilized austenite is investigated in Fe-Mn binary alloys. A 30 pct thickness reduction by rolling at 673 K (above the A/sub f/ temperature) largely suppresses the austenite (..gamma..) to hcp epsilon martensite (EPSILON) transformation in 17Mn and 25Mn steels. However, the deformation behavior of the mechanically stabilized austenite in the two alloys differs significantly. In 25Mn steel, the onset of plastic deformation is due to the stress-induced ..gamma.. ..-->.. EPSILON transformation and results in a positive temperature dependence of the yield strength. The uniform elongation is enhanced by the ..gamma.. ..-->.. EPSILON transformation during deformation. In 17Mn steel, bcc ..cap alpha..' martensite is deformation-induced along with EPSILON and a plateau region similar to Luders band deformation appears at the beginning of the stress-strain curve. The mechanical stabilization of austenite also suppresses the intergranular fracture of 17Mn steel at low temperatures.

• Research Organization: Lawrence Livermore National Lab., Livermore, CA (US)
• OSTI ID: 6628707
• Journal Information: Metall. Trans., A; (United States), Vol. 19A:6
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
AUSTENITIC STEELS
TENSILE PROPERTIES
IRON
BINARY ALLOY SYSTEMS
MANGANESE
DEFORMATION
HIGH TEMPERATURE
MARTENSITE
PHASE TRANSFORMATIONS
TEMPERATURE DEPENDENCE
ALLOY SYSTEMS
ALLOYS
CARBON ADDITIONS
ELEMENTS
IRON ALLOYS
IRON BASE ALLOYS
MECHANICAL PROPERTIES
METALS
STEELS
TRANSITION ELEMENTS
360103* - Metals & Alloys- Mechanical Properties
360102 - Metals & Alloys- Structure & Phase Studies