Microstructural Evolution during Simple Heavy Warm Deformation of a Low-Carbon Steel

S.V.S. Narayana Murty; Shiro Torizuka; Kotobu Nagai

doi:10.4028/www.scientific.net/MSF.512.49

Paper Titles

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Damage Mechanism for Controlling Ductile Cracking of Structural Steel with Heterogeneous Microstructure
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Superplastic Deformation and Thermal Crystallization Behavior of Supercooled Liquid in Zr-Ni Based Metallic Glass
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Effect of Cooling Rate on As-Cast Texture of Low-Carbon Steel Strips During Rapid Solidification
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Microstructural Evolution during Simple Heavy Warm Deformation of a Low-Carbon Steel
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Effect of Hydrogen on the Fracture Behavior of High-Strength Cr-Mo Steel
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Evaluation Method for Fracture Mechanics-Based Material Toughness from Charpy Impact Test
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Temperature and Orientation Dependence of Fracture Behavior of Directionally Solidified Duplex-Phase Crystals Composed of Ni₃X-Type Intermetallic Compounds
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Microstructural Evolution in 36%Ni Austenitic Steel during the ARB Process
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HomeMaterials Science ForumMaterials Science Forum Vol. 512Microstructural Evolution during Simple Heavy Warm...

Microstructural Evolution during Simple Heavy Warm Deformation of a Low-Carbon Steel

Abstract:

We examined the microstructure development in low carbon steel (0.15% C) during heavy warm deformation (HWD) using field emission scanning electron microscopy (FESEM) and electron back-scattering diffraction (EBSD). Plane strain compression tests have been conducted in the temperature range of 773-923 K at strain rates of 0.01 s-1 and 1 s-1 with the specimens deformed to 25% of their original thickness. We summarize the strain rate and temperature into the Zener-Hollomon parameter and investigate its variation with plastic strain on the basis of the evolved microstructures and grain boundary character with a view to understanding the critical conditions for forming ultrafine grains and classifying them. Once established, these compressive strain-Z parameter plots simplify the selection of processing parameters (such as strain, strain rate, and temperature), towards achieving tailor-made microstructures in industrial components.