Formability of type 304 stainless steel sheet

Conference · Tue Sep 01 04:00:00 EDT 1992

OSTI ID:10172896

Coubrough, G J ^[1]; Matlock, D K; VanTyne, C J ^[2]

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1. EG and G Rocky Flats, Inc., Golden, CO (United States). Rocky Flats Plant
2. Colorado School of Mines, Golden, CO (United States)

Punch-stretch tests to determine formability of type 304 stainless steel sheet were conducted using a hemispherical dome test. Sheets of 19.1 mm width and 177.8 mm width were stretched on a 101.6 mm diameter punch at punch rates between 0.042 to 2.12 mm/s with three lubricant systems: a mineral seal oil, thin polytetrafluoroethelyne sheet with mineral seal oil, and silicone rubber with mineral seal oil. The resulting strain distributions were measured and the amount of martensite was determined by magnetic means. Increasing lubricity resulted in more uniform strain distributions while increased punch rates tended to decrease both strain and transformation distributions. High forming limit values were related to the formation of high and uniformly distributed martensite volume fractions during deformation. The results of this study are interpreted with an analysis of the effects of strain and temperature on strain induced martensite formation in metastable austenitic stainless steels.

• Research Organization: EG and G Rocky Flats, Inc., Golden, CO (United States). Rocky Flats Plant
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC34-90DP62349
• OSTI ID: 10172896
• Report Number(s): RFP--4607; CONF-930330--1; ON: DE92018619
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360101
HEATING
LUBRICANTS
MARTENSITE
MATERIALS WORKING
PREPARATION AND FABRICATION
SHEETS
SPATIAL DISTRIBUTION
STAINLESS STEEL-304
STRAINS