ISSN 2594-5327
49º Congresso anual — Vol. 49, Num. 1 (1994)
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Processing approaches to produce low-carbon sheet steels to meet increasing demands for higher strengths with high formability are described. Such high-performance steels have multiphase microstructures, developed through intercritical annealing and isothermal transformation, which consist of ferrite, bainite, martensite, and retained austenite. Superior strength-ductility combinations result from transformation-induced plasticity (TRIP) mechanisms which induce transformation of retained austenite to martensite with strain. In conjunction with composition control, the combination of intercritical annealing and isothermal holding at bainitic transformation temperatures offers the optimal processing path to produce steels with bainite and high retained austenite contents in a polygonal ferrite matrix. In this paper, the significance of austenite transformation during deformation on the strength and ductility of Mn-Si sheet steels is discussed and guidelines for processing for optimal properties are presented.
Palavras-chave
TRIP steels, multiphase microstructure, retained austenite, intercritical annealing, high-strength sheet steel
Como citar
MATLOCK, DAVID K.; KRAUSS, GEORGE.
HIGH PERFORMANCE MULTI-PHASE SHEET STEELS,
p. 3595-3608.
In: 49º Congresso anual,
Rio de Janeiro, Brasil,
1994.
ISSN: 2594-5327, DOI 10.5151/2594-5327-49v8-77-90
