Microstructure and Mechanical Properties of Ultra-High Strength Steel Plates with High Deformability

Byoung Chul Hwang; Chang Gil Lee; Sung Hak Lee

doi:10.4028/www.scientific.net/MSF.638-642.3266

Paper Titles

Microstructure and Mechanical Properties of Cooled and Tempered Cu and Nb-Bearing Ultra-Low Carbon Steels
p.3242

Dependence of Yield Strength on Ferrite Grain Size in Ferrite/Cementite and Ferrite/Pearlite Structures of Medium Carbon Steel
p.3248

Fatigue Performance of Laser Brazes in Advanced High Strength Steels
p.3254

Effect of Si on Mechanical Property of Galvannealed Dual Phase Steel
p.3260

Microstructure and Mechanical Properties of Ultra-High Strength Steel Plates with High Deformability
p.3266

Microstructure and Texture Evolution in a High Manganes Austenitic Steel During Tensile Test
p.3272

Static Strain Ageing in Some Austenitic Stainless Steels
p.3278

Study of the Columnar Grain Growth in IF Steels during Continuous Heat Cycles
p.3284

A Technical and Economic Analysis of Pig Iron Production
p.3291

HomeMaterials Science ForumMaterials Science Forum Vols. 638-642Microstructure and Mechanical Properties of...

Microstructure and Mechanical Properties of Ultra-High Strength Steel Plates with High Deformability

Abstract:

High deformability has been considered as a critical factor of ultra-high strength steel plates subjected to compressive, tensile, and bending deformation induced by large ground movements. In this paper, various dual phase microstructures consisting of soft ferrite and strong low-temperature transformation phases without deformation in the (austenite + ferrite) two-phase temperature region after controlled rolling were introduced and then the mechanical properties were discussed with emphasis on deformability such as yield ratio and uniform elongation. Ultra-high strength steel plates fabricated by a modified thermo-mechanical control process showed lower yield ratio of under 0.75 and higher uniform elongation of 5% as a minimum, as compared to commercial API X100 and X120 grade pipeline steels, without much sacrifice of Charpy impact properties because of an appropriate formation of soft ferrite and strong low-temperature transformation phases.

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Periodical:

Materials Science Forum (Volumes 638-642)

Pages:

3266-3271

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.638-642.3266

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Online since:

January 2010

Authors:

Byoung Chul Hwang, Chang Gil Lee, Sung Hak Lee

Keywords:

High Deformability, Mechanical Property, Ultra-High Strength Steel Plate

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