The effect of stress-state on the large strain inelastic deformation behavior of 304L stainless steel

Journal Article · Mon Jan 01 00:00:00 EST 1996 · Journal of Engineering Materials and Technology

DOI:https://doi.org/10.1115/1.2805930· OSTI ID:203570

Miller, M P ^[1]; McDowell, D L ^[2]

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1. Cornell Univ., Ithaca, NY (United States). Sibley School of Mechanical and Aerospace Engineering
2. Georgia Tech, Atlanta, GA (United States). George Woodruff School of Mechanical Engineering

In metals, large strain inelastic deformation processes such as the formation of a preferred crystallographic orientation (crystallographic texture) and strain hardening processes such as the formation and evolution of dislocation substructures depend on stress-state. Much of the current large strain research has focused on texture. Crystallographic texture development and strain-hardening processes each contribute to the overall material behavior, and a complete description of large strain inelastic material response should reflect both. An investigation of the large strain behavior of 304L stainless steel (SS 304L) subjected to compression, torsion, and sequences of compression followed by torsion and torsion followed by tension is reported. This paper focuses on the stress-state dependence of strain-hardening processes as well as the relative effect such processes have on the overall material behavior. To characterize these processes, transmission electron microscopy (TEM) as well as magnetization investigations were conducted at different strain levels and under different deformation modes. The {gamma} {yields} {alpha}{prime} martensitic transformation which occurs in this material was found to be related to both the strain level and stress state. Dislocation substructures in the form of Taylor lattices, dense dislocation walls, and microbands were also present. The ramifications of using a thin-walled tubular torsion specimen were also explored.

• Sponsoring Organization: USDOE
• OSTI ID: 203570
• Journal Information: Journal of Engineering Materials and Technology, Vol. 118, Issue 1; Other Information: PBD: Jan 1996
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
STAINLESS STEEL-304L
MECHANICAL PROPERTIES
MICROSTRUCTURE
CHEMICAL COMPOSITION
COMPRESSION STRENGTH
TENSILE PROPERTIES
TORSION
TRANSMISSION ELECTRON MICROSCOPY
MAGNETIZATION
STRAINS
STRESSES
DISLOCATIONS
PHASE TRANSFORMATIONS
X-RAY DIFFRACTION
AUSTENITE
MARTENSITE
EXPERIMENTAL DATA