| 球墨铸铁 GS 52 的超声疲劳寿命研究 |
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| 引用本文： | 陶华.球墨铸铁 GS 52 的超声疲劳寿命研究[J].机械科学与技术(西安),1998,17(2):294-295. |
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| 作者姓名： | 陶华 |
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| 作者单位： | 西北工业大学 |
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| 摘 要： | 用超声疲劳试验技术研究了球墨铸铁ＧＳ５２在２０ｋＨｚ时的疲劳寿命。与３０Ｈｚ常规试验结果进行了比较，未发现高频率对ＧＳ５２的疲劳寿命有影响。Ｓ－Ｎ曲线显示在５１０５～１０７周次时，超声疲劳与常规试验结果一致，在１０６～３１０９周次之间，曲线仍稍下降，而未呈水平。Ｎｔ＝１０７周次的条件疲劳极限为２２０ＭＰａ，１０９周次时为２０５ＭＰａ。
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| 关 键 词： | 超声疲劳 疲劳寿命 球墨铸铁 |
Study on the Ultrasonic Fatigue Life of a Nodular Cast Iron GS 52 |
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| Tao Hua.Study on the Ultrasonic Fatigue Life of a Nodular Cast Iron GS 52[J].Mechanical Science and Technology,1998,17(2):294-295. |
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| Authors: | Tao Hua |
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| Abstract: | The fatigue life of GS 52 nodular graphite cast iron was studied with the ultrasonic fatigue technique at 20 kHz. The results obtained were compared with that of comventional frequency fatigue testing. No influence by the high frequency on fatigue life was observed for GS 52. The S N curve shows that the results at 20 kHz agree with that at 30 Hz between 5·10 5 and 10 7 cycles. And between 10 6 and3·10 9 cycles the asymptote presumed of the S N curve is inclined gently, but not horizontal. The fatigue limit at 10 7 cycles is 220 MPa, and is 205 MPa at 10 9 cycles. |
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| Keywords: | Ultrasonic fatigue Fatigue life Nodular cast iron |
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