Formation and Thermal Fatigue Properties of Fine-grained Heat Affected Zone on Cast-hot-working-die Steel after Electropulsing Stimulation with High Current Density
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概要
- 論文の詳細を見る
The fatigue crack propagation behaviors of cast-hot-working die (CHWD) steel untreated and treated by electropulsing stimulation with different current densities were investigated in the present study. The elliptical heat affected zone (HAZ) was formed ahead of specimen notch tip due to the concentrating heat release induced by current bypassing and concentrating effect. The acreages of specimen HAZs were gradually enlarged because of the more heat energy input by elevating current density of electropulsing stimulation. The grain refinement and dislocation density increase in the specimen HAZs were enhanced by elevating the current density of electropulsing stimulation, which inevitably resulted in the improvement on the HAZ mechanical properties and the enhance of fatigue resistance. In addition, the induced compressive stress by electropulsing stimulation could decrease the peak value of tensile stress forming in the thermal fatigue process, which also enhanced the thermal fatigue resistance. Consequently, the resistance to thermal fatigue of CHWD steel was enhanced by grain refinement, dislocation density increase and induced compressive stress after electropulsing stimulation with high current density.
- 社団法人 日本鉄鋼協会の論文
- 2008-11-15
著者
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Ma Jun
Key Laboratory Of Crop Germplasm Resources Of Hebei Agricultural University Of Hebei
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Lin Huaqiang
Key Laboratory Of Automobile Materials Of Ministry Of Education And Department Of Materials Science
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LINA Huaqiang
Key Laboratory of Automobile Materials of Ministry of Education and Department of Materials Science
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ZHAO Yuguang
Key Laboratory of Automobile Materials of Ministry of Education and Department of Materials Science
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ZHAO Bin
School of Foreign Language Education, Jilin University
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HAN Liguang
Key Laboratory of Automobile Materials of Ministry of Education and Department of Materials Science
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JIANG Qichuan
Key Laboratory of Automobile Materials of Ministry of Education and Department of Materials Science
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Zhao Yuguang
Key Laboratory Of Automobile Materials Of Ministry Of Education And Department Of Materials Science
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Jiang Qichuan
Key Laboratory Of Automobile Materials Department Of Materials Science And Engineering Jilin Univers
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Ma Jun
Key Laboratory Of Automobile Materials Of Ministry Of Education And Department Of Materials Science
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Zhao Bin
School Of Foreign Language Education Jilin University
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Jiang Qichuan
Key Laboratory Of Automobile Materials Of Ministry Of Education And Department Of Materials Science
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