Title

Tensile Deformation Temperature Impact on Microstructure and Mechanical Properties of AISI 316LN Austenitic Stainless Steel

Document Type

Article

Publication Date

2018

Keywords

AISI 316LN austenitic stainless steel, deformation-induced martensite transformation, mechanical properties, microstructure

Digital Object Identifier (DOI)

https://doi.org/10.1007/s11665-018-3234-9

Abstract

Uniaxial tensile tests were conducted on AISI 316LN austenitic stainless steel from − 40 to 300 °C at a rate of 0.5 mm/min. Microstructure and mechanical properties of the deformed steel were investigated by optical, scanning and transmission electron microscopies, x-ray diffraction, and microhardness testing. The yield strength, ultimate tensile strength, elongation, and microhardness increase with the decrease in the test temperature. The tensile fracture morphology has the dimple rupture feature after low-temperature deformations and turns to a mixture of transgranular fracture and dimple fracture after high-temperature ones. The dominating deformation microstructure evolves from dislocation tangle/slip bands to large deformation twins/slip bands with temperature decrease. The deformation-induced martensite transformation can only be realized at low temperature, and its quantity increases with the decrease in the temperature.

Was this content written or created while at USF?

Yes

Citation / Publisher Attribution

Journal of Materials Engineering and Performance, v. 27, p. 1232-1240

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