Ultra Grain Refinement in a Plain Carbon Steel by Means of Warm Torsion Testing

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概要

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• Ultra grain refinement of a plain carbon SAE-AISI 1010 steel has been obtained by means of warm torsion testing. Tests were conducted at 500°C, constant strain rate of 0.1 s−1 and total equivalent strain of 0.8, 1.6, 4.0 and 5.6. The average ferritic grain size obtained was smaller than 0.5 μm. The steel microstructure consisted of elongated ferrite grains and fragmented and spheroidized cementite particles, similar to the microstructures found in carbon steel severely plastic deformed, like in the ARB and ECAP processes. The average ferritic grain size is reasonably predicted by the Hall–Petch equation. The mechanisms by which ultra grain refinement has been achieved here has been attributed to dynamic recovery and continuous dynamic recrystallization of the ferrite during warm plastic deformation. Warm torsion testing proved to be a suitable tool to study grain refining mechanism through severe plastic deformation.

• 社団法人 日本鉄鋼協会の論文
• 2010-10-15

著者

• Barbosa Ronaldo

  Department Of Metallurgical And Materials Engineering Federal University Of Minas Gerais

• Calado Welbert

  Department Of Metallurgical And Materials Engineering Federal University Of Minas Gerais

• Barbosa Ronaldo

  Department de Engenharia Metalúrgica, Universidade Federal de Minas Gerais

関連論文

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• Effects of Dynamic Strain Aging on High Temperature Mechanical Proprieties for a Structural Steel Containing Mo and Nb
• Ultra Grain Refinement in a Plain Carbon Steel by Means of Warm Torsion Testing
• Influence of Carbon Content and Deformation Temperature on Ultra-Grain Refinement of Plain Carbon Steels by Means of Torsion Test
• Analysis of the Occurrence of Dynamic Recrystallization in Hot Rolling by Modeling of the Stress-Strain Curve.

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