Mechanism of Improved Ductility of 1500 MPa-class Ultra-high Strength Cold-rolled Steel Sheet Produced by Rolling and Partitioning Method
Yoshihiro Hosoya, Yuta Matsumura, Yo Tomota, Yusuke Onuki, Stefanus Harjo
Abstract
By using a steel with standardized chemical composition and conventional manufacturing processes for flat-rolled steel strip, a 1500 MPa class stainless steel sheet, whose product of yield strength (YS) and total elongation (El) exceeds 30000 MPa%, was developed and its mass production was established. Besides the excellent YS–El balance, the developed steel sheet has excellent performance for not only an anti-secondary work embrittlement but also high cycle fatigue endurance.
Topics & Concepts
Materials scienceMetallurgyDuctility (Earth science)ElongationHigh strength steelEmbrittlementUltimate tensile strengthComposite materialCreepMicrostructure and Mechanical Properties of SteelsMetallurgy and Material FormingAluminum Alloy Microstructure Properties