| THERMAL FATIGUE CRACKING IN STEEL 5CrMnMo |
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| 作者姓名： | HE Shiyu LI Ying LIU Jianhong Harbin Institute of Technology Harbin China HE Shiyu Faculty of Metal Harbin Institute of Technology Harbin China |
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| 作者单位： | HE Shiyu LI Ying LIU Jianhong Harbin Institute of Technology，Harbin，China HE Shiyu，Faculty of Metal，Harbin Institute of Technology，Harbin，150006，China |
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| 摘 要： | The thermal fatigue behaviour of steel 5CrMnMo after various heat treatments has beenexamined by means of Coffin-model and self-strained thermal fatigue testing machines.Thethermal fatigue crack initiation and propagation have been observed under SEM and TEM.The majority of thermal fatigue cracks of the quenched samples initiated firstly at the grainboundaries and that of the quenched-tempered samples at the breakage interface of the car-bide and matrix.The thermal fatigue cracks of either quenched or quenched-tempered steelpropagated mainly along the breakage interface of carbide and grain boundaries.
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| 收稿时间： | 1991-02-25 |
| 修稿时间： | 1991-02-25 |
THERMAL FATIGUE CRACKING IN STEEL 5CrMnMo |
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| HE Shiyu LI Ying LIU Jianhong Harbin Institute of Technology,Harbin,China HE Shiyu,Faculty of Metal,Harbin Institute of Technology,Harbin,,China.THERMAL FATIGUE CRACKING IN STEEL 5CrMnMo[J].Acta Metallurgica Sinica(English Letters),1991,4(1):55-58. |
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| Authors: | HE Shiyu LI Ying LIU Jianhong Harbin Institute of Technology Harbin China HE Shiyu Faculty of Metal Harbin Institute of Technology Harbin China |
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| Abstract: | The thermal fatigue behaviour of steel 5CrMnMo after various heat treatments has been examined by means of Coffin-model and self-strained thermal fatigue testing machines.The thermal fatigue crack initiation and propagation have been observed under SEM and TEM. The majority of thermal fatigue cracks of the quenched samples initiated firstly at the grain boundaries and that of the quenched-tempered samples at the breakage interface of the car- bide and matrix.The thermal fatigue cracks of either quenched or quenched-tempered steel propagated mainly along the breakage interface of carbide and grain boundaries. |
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| Keywords: | thermal fatigue crack carbide grain boundary |
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