Effects of Dynamic Strain Aging on High Temperature Mechanical Proprieties for a Structural Steel Containing Mo and Nb
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概要
- 論文の詳細を見る
The influence of dynamic strain aging (DSA) on the high temperature strength of a structural steel microalloyed with Mo and Nb was investigated by means of tensile tests performed at temperatures ranging from 25 to 600°C and strain rates of 10−4 to 10−1 s−1. This steel showed a ferrite and pearlite microstructure. DSA manifestations are less intense than those observed for low carbon steels and they take place at higher temperatures. The secondary precipitation behavior of the steel was also investigated. The hardness of samples heat treated at 100 to 600°C displayed a maximum at 400°C. Samples treated at this temperature and tensile tested at 600°C didnt showed a higher yield strength than the untreated specimens, indicating that secondary precipitation does not contribute to its high temperature strength. Results obtained here indicated that DSA in the structural steel might be an important mechanism responsible for its fire resistance. The empirical activation energies related to the appearance of serrations on the stress–strain curves and to the maxima on the variation of tensile strength with temperature or disappearance of serrations suggested that the high temperature strengthening associated with DSA in this steel is the dynamic interaction of interstitial-substitutional solute dipoles and dislocations.
- 社団法人 日本鉄鋼協会の論文
- 2008-11-15
著者
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Gonzalez Berenice
Departamento De Engenharia Metalurgica E De Materiais Universidade Federal De Minas Gerais
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BARBOSA Ronaldo
Department of Metallurgical and Materials Engineering, Federal University of Minas Gerais
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Castro Cynthia
Fundacao Centro Tecnologico De Minas Gerais Metallurgical Technology Division
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CALADO Welbert
Department of Metallurgical and Materials Engineering, Universidade Federal de Minas Gerais
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DOS SANTOS
Usiminas, Research and Development Center
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Dos Santos
Usiminas Research And Development Center
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Calado Welbert
Department Of Metallurgical And Materials Engineering Universidade Federal De Minas Gerais
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Barbosa Ronaldo
Department Of Metallurgical And Materials Engineering Federal University Of Minas Gerais
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Barbosa Ronaldo
Department Of Metallurgical And Materials Engineering Universidade Federal De Minas Gerais
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Gonzalez Berenice
Dep. Of Metallurgical And Materials Engineering Universidade Federal De Minas Gerais
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Calado Welbert
Department Of Metallurgical And Materials Engineering Federal University Of Minas Gerais
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Barbosa Ronaldo
Department de Engenharia Metalúrgica, Universidade Federal de Minas Gerais
関連論文
- Mechanical Behavior and Microstructure of High Carbon Si-Mn-Cr Steel with Trip Effect
- Effects of Dynamic Strain Aging on High Temperature Mechanical Proprieties for a Structural Steel Containing Mo and Nb
- Measurement of Dynamic Strain Aging in Pearlitic Steels by Tensile Test
- Ultra Grain Refinement in a Plain Carbon Steel by Means of Warm Torsion Testing
- Kinetics of Strain Aging in Cold Rolled Low Strength Multiphase Steel
- 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.