| 3Cr2W8V钢热疲劳裂纹长大方式的原位观察 |
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| 引用本文： | 刘剑虹,何世禹,姚枚. 3Cr2W8V钢热疲劳裂纹长大方式的原位观察[J]. 金属学报, 1992, 28(12): 15-17 |
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| 作者姓名： | 刘剑虹 何世禹 姚枚 |
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| 作者单位： | 哈尔滨工业大学(刘剑虹，何世禹) |
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| 摘 要： | 在TS-2型台式扫描电子显微镜中,装入自制的微型热疲劳试验装置,观察了3Cr2W8V钢热疲劳裂纹长大过程,结果表明:热疲劳裂纹长大前,主裂纹尖端首先钝化,在其前方出现孔洞或不连续微裂纹,热疲劳裂纹的长大通过主裂纹与孔洞及微裂之间的桥接方式进行。
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| 关 键 词： | 热疲劳 裂纹长大 热作工具钢 |
IN SITU OBSERVATION OF THERMAL FATIGUE CRACK GROWTH IN 3Cr2W8V STEEL |
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| LIU Jianhong,HE Shiyu,YAO Mei. IN SITU OBSERVATION OF THERMAL FATIGUE CRACK GROWTH IN 3Cr2W8V STEEL[J]. Acta Metallurgica Sinica, 1992, 28(12): 15-17 |
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| Authors: | LIU Jianhong HE Shiyu YAO Mei |
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| Affiliation: | Harbin Institute of Technology |
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| Abstract: | The growing process of thermal fatigue cracking in 3Cr2W8V steel was observed under desk SEM fitted with self-made minisized device for thermal fatigue test. Before growing of thermal fatigue crack, the main crack tip reveals to blunt firstly, and some holes and uncontinuous microcracks occur in front of it. The growth is developed by bridging of main crack together with holes and microcracks. |
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| Keywords: | 3Cr2W8V steel thermal fatigue crack growth in situ observation |
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