Influences of Severe Deformation and Alloy Modification on Secondary Hardening and Fracture Behavior

Ho Sup Sim; K.S. Lee; Kon Bae Lee; Hyung Ryul Yang; Hoon Kwon

doi:10.4028/www.scientific.net/MSF.475-479.183

Paper Titles

Texture Developments during Ferrite Refinement through Deformation-Enhanced Ferrite Transformation and Dynamic Recrystallization in Low Carbon Steel
p.165

Prediction of Flow Stress and Microstructural Evolution during Hot Forging of Three Microalloyed Medium Carbon Steels
p.169

Effect of Initial Structure on Recrystallized Austenite Grain Size of Fe-32%Ni Alloy
p.175

Effect of Austempering Process on the Properties of TRIP-Steel
p.179

Influences of Severe Deformation and Alloy Modification on Secondary Hardening and Fracture Behavior
p.183

Surface Age-Hardened High Speed Steel with High Co Content Formed on Undecarburized Carbon Steel
p.187

Effect of Aging Treatment on High Temperature Strength of Nb Added Ferritic Stainless Steels
p.191

Effect of Ti on Formability of IF Steels
p.195

Wear Behavior of an Austempered Ductile Iron Containing Mo-Ni-Cu
p.199

HomeMaterials Science ForumMaterials Science Forum Vols. 475-479Influences of Severe Deformation and Alloy...

Influences of Severe Deformation and Alloy Modification on Secondary Hardening and Fracture Behavior

Abstract:

Secondary hardening and fracture behavior in the high Co-Ni steels containing W, has been studied in terms of severe deformation, Cr addition, and austenite condition. Two kinds of Co- Ni steels, containing the only W(W steel), and the W and Cr(WCr steel), were severely rolled and followed by direct quenching(DQ). In comparison with undeformed specimens, reaustenitizing( RA) was performed. DQ specimens exhibited higher impact toughness as well as higher hardness, as compared to RA specimens. The aging kinetics of the WCr steel was accelerated due to the Cr addition. While the W steel showed the intergranular embrittlement in the high temperature RA condition, in addition, the WCr steel exhibited the transgranular mode of mostly dimple type.

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Materials Science Forum (Volumes 475-479)

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183-186

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https://doi.org/10.4028/www.scientific.net/MSF.475-479.183

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Online since:

January 2005

Authors:

Ho Sup Sim, K.S. Lee, Kon Bae Lee, Hyung Ryul Yang, Hoon Kwon

Keywords:

Co-Ni Steel, Fracture, Secondary Hardening, Severe Deformation, Ultra High-Strength Steel

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