EXPERIMENTS TO DETERMINE SMALL OFFSET YIELD SURFACES FOR 304L STAINLESS STEEL UNDER COMBINED TENSION AND TORSION

The highly strain-hardening nature of 304L stainless steel, coupled with hardening due to a stress-induced martensitic transformation, caused considerable difficulty in determination of yield curves by a multiple-probe small-offset technique. Small probes of added shearing stress appeared to cause considerably more accumulated strain-hardening damage to a yield curve than small probes of added tensile stress. When a portion of a yield curve could be defined it appeared to be convex, and the plastic strain increment vector was normal in agreement with the stability postulate. Some evidence to support corner formation on a yield curve due to the disturbance of probing is presented. The exact nature of corners is indeterminant. An extreme Bauschinger effect for surprisingly small prestrains was observed in both tension and torsion.

• Supplemental Notes:
  • Sponsored by the Office of Naval Research, 495 Summer Street, Boston, Massachusetts 02210.
• Corporate Authors:

  Brown University

  Division of Engineering
  Providence, RI  United States  02912
• Authors:
  • Michno Jr, M J
  • Findley, W N
• Publication Date: 1972-4

Media Info

• Features: Figures; References;
• Pagination: 29 p.
• Serial:
  • Issue Number: 16

Subject/Index Terms

• TRT Terms: Stainless steel; Strain hardening; Structural analysis; Test procedures
• Subject Areas: Marine Transportation; Materials;

Filing Info

• Accession Number: 00035641
• Record Type: Publication
• Source Agency: Ship Structure Committee
• Report/Paper Numbers: 064-424 Tech Rpt
• Contract Numbers: N00014-67-A-01910003
• Files: TRIS
• Created Date: Oct 13 1973 12:00AM