Effect of Chemical Composition on Tensile Property in TRIP-assisted Multiphase Steel Composed of Fe-Mn-Si-C Jeonnam Advanced Materials Industrialization Center

Format:

Conference/Event

Author/Creator:

Lee, Ki Yeol, author.

Conference Name:

Asia Pacific Automotive Engineering Conference (2007-08-05 : Hollywood, California, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2007

Summary:

The microstructural changes and the tensile properties of the TRIP-assisted steels resulting from the different chemical compositions were investigated by using SEM, TEM, XRD and UTM. As a result of microscopic observation, morphology of retained austenite could be identified into two types: a granular type in steel containing higher Si and a film type in steel having higher C. In the case of the steel containing higher C with a tensile strength of 860 MPa and a total elongation of 38 %, the film-typed retained austenite could be observed among the lath bainitic ferrites. Actually, the metastable retained austenite was the requisite for the good formability, which means that the chemical composition plays a significant role in the microstructure and the tensile property of a TRIP-assisted steel. Regarding the tensile property, each steel containing adequate amount of Si and Mn showed a typical TRIP effect on a stress-strain curve while the steel containing a higher Mn content exhibited the similar behaviors shown in the dual phase steels

Notes:

Vendor supplied data

Publisher Number:

2007-01-3728

Access Restriction:

Restricted for use by site license