Temperature Effects on the Deformation and Fracture of a Quenched-and-Partitioned Steel General Motors Company

Format:

Conference/Event

Author/Creator:

Coryell, Coryell, author.

Contributor:

Hector, Louis

Mishra, Sushil

Savic, Vesna

Conference Name:

SAE 2013 World Congress & Exhibition (2013-04-16 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2013

Summary:

Temperature effects on the deformation and fracture of acommercially produced transformation-induced plasticity (TRIP)steel subject to a two-step quenching and partitioning (Q&P)heat treatment are investigated. Strain field evolution at roomtemperature is quantified in this 980 MPa grade Q&P steel witha stereo digital image correlation (DIC) technique fromquasi-static tensile tests of specimens with 0°, 45°, and 90°orientations. Baseline tensile properties along with the variationof the instantaneous hardening index with strain were computed.Variations of the bake-hardening index were explored undersimulated paint bake conditions. Tensile properties were measuredat selected temperatures between -100°C and 200°C and the TRIPeffect was found to be temperature-dependent due to stress-inducedmartensitic transformation at lower temperatures versusstrain-induced transformation at higher temperatures. Electronback-scatter diffraction (EBSD) and X-ray diffraction (XRD) ofregions close to the fracture area were used to explain theobserved temperature variations of the ultimate tensile strength(UTS), 0.2% yield strength (0.2%YS), uniform elongation (UE) andtotal elongation (TE)

Notes:

Vendor supplied data

Publisher Number:

2013-01-0610

Access Restriction:

Restricted for use by site license