| 30CrMnSiNi2A和GC4（40CrMnSiMoVA）钢裂纹扩展性能比较分析研究 |
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| 引用本文： | 徐人平,李淑兰.30CrMnSiNi2A和GC4（40CrMnSiMoVA）钢裂纹扩展性能比较分析研究[J].航空材料学报,2004,24(6):7-10. |
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| 作者姓名： | 徐人平 李淑兰 |
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| 作者单位： | 昆明理工大学,云南,昆明,650051 |
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| 摘 要： | 在分析30CrMnSiNi2A和GC4力学性能的基础上,在相同裂纹长度条件下,对两种材料的裂纹扩展寿命和裂纹扩展速率的统计特性进行了统计研究。经比较分析后认为,由于30CrMnSiNi2A钢的裂纹扩展速率较慢,故裂纹扩展寿命较长,但由于其分散性较大,在裂纹长度较大时,99.9%的安全寿命尽管仍比GC4钢大,但两者已很接近。
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| 关 键 词： | 30CrMnSiNi2A GC4 统计分析 裂纹扩展寿命 裂纹扩展速率 |
| 文章编号： | 1005-5053(2004)06-0007-04 |
| 修稿时间： | 2003年3月9日 |
Statistical analysis of crack growth character for 30CrMnSiNi2A and GC4(40CrMnSiMoVA) steel |
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| XU Ren-ping,LI Shu-lan.Statistical analysis of crack growth character for 30CrMnSiNi2A and GC4(40CrMnSiMoVA) steel[J].Journal of Aeronautical Materials,2004,24(6):7-10. |
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| Authors: | XU Ren-ping LI Shu-lan |
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| Abstract: | Based on the research of mechanical performance, crack growth rates and crack growth life for 30CrMnSiNi2A and GC4 steel were analyzed statistically on the same crack length condition. By analysis and comparison, two conclusions were obtained: (i) crack growth rate of 30CrMnSiNi2A steel was smaller than that of GC4 steel; (ii) crack growth life of 30CrMnSiNi2A steel was longer than that of GC4 steel. Because the variance of the fatigue life of 30CrMnSiNi2A steel was much larger than that of GC4, the 99.9% reliability safe life of 30CrMnSiNi2A steel was nearly similar to that of GC4 steel, even though its reliability safe life was still longer than that of GC4 steel. |
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| Keywords: | 30CrMnSiNi2A GC4 statistical analysis crack growth life crack growth rate |
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