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Cold Work Embrittlement of Interstitial Free Steel.

DE2003805761

Publication Date	2002
Personal Author	Martin, P.; Bowker, J. T.
Page Count	151
Abstract	This work addresses the issues of measurement of secondary cold work embrittlement (SCWE) of an IF steel in deep-drawn parts using laboratory tests, and its correlation with real part fracture. It aimed at evaluating the influence of the steel chemistry and processing condition, microstructure, and test conditions, on SCWE as well as the effect of SCWE on fatigue properties. Size 6-inch cups produced with various draw ratios or trimmed at different heights were tested to determine the ductile-to-brittle-transition temperature (DBTT) as a function of strain. The 2-inch cup/expansion test, bend test and fracture of notched specimens were also used to generate information complementary to that provided by the 6-inch cup/expansion test. The relationship between laboratory tests and fracture in real parts was established by testing large-scale parts. The fatigue behavior was investigated in the as-rolled and deep drawn (high stain) conditions, using prestrained specimens taken from the wall of a formed part.
Keywords	Steels Embrittlement Interstitials Fractures Microstructure Chemistry Ductile brittle transition Fatigue Laboratory tests
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Canada Centre for Mineral and Energy Technology, Ottawa (Ontario).; Department of Energy, Washington, DC.
Supplemental Notes	Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200321

Cold Work Embrittlement of Interstitial Free Steel.

Cold Work Embrittlement of Interstitial Free Steel.
DE2003805761

Publication Date	2002
Personal Author	Martin, P.; Bowker, J. T.
Page Count	151
Abstract	This work addresses the issues of measurement of secondary cold work embrittlement (SCWE) of an IF steel in deep-drawn parts using laboratory tests, and its correlation with real part fracture. It aimed at evaluating the influence of the steel chemistry and processing condition, microstructure, and test conditions, on SCWE as well as the effect of SCWE on fatigue properties. Size 6-inch cups produced with various draw ratios or trimmed at different heights were tested to determine the ductile-to-brittle-transition temperature (DBTT) as a function of strain. The 2-inch cup/expansion test, bend test and fracture of notched specimens were also used to generate information complementary to that provided by the 6-inch cup/expansion test. The relationship between laboratory tests and fracture in real parts was established by testing large-scale parts. The fatigue behavior was investigated in the as-rolled and deep drawn (high stain) conditions, using prestrained specimens taken from the wall of a formed part.
Keywords	Steels Embrittlement Interstitials Fractures Microstructure Chemistry Ductile brittle transition Fatigue Laboratory tests
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Canada Centre for Mineral and Energy Technology, Ottawa (Ontario).; Department of Energy, Washington, DC.
Supplemental Notes	Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200321