| AC4B铝合金缸盖轴向疲劳强度的研究 |
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| 引用本文： | 张敏红,曹喜彪,乔晟霦,华勤.AC4B铝合金缸盖轴向疲劳强度的研究[J].特种铸造及有色合金,2012,32(5):482-485. |
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| 作者姓名： | 张敏红 曹喜彪 乔晟霦 华勤 |
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| 作者单位： | 1. 上海大学材料科学与工程学院;上海皮尔博格有色零部件有限公司
2. 上海大学材料科学与工程学院 |
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| 摘 要： | 150℃下,在AC4B铝合金的C14缸盖铸件本体上取样,进行高周(107循环次数)和低周(105循环次数)疲劳试验。运用非线性拟合和统计方法求得AC4B铝合金的低周疲劳强度和高周疲劳强度。试验结果表明,高周疲劳S-N曲线呈二阶指数衰减形态,满足"有限疲劳极限"条件。低周疲劳S-N曲线呈二次方程形态。两种方法求得AC4B铝合金的高周疲劳强度和低周疲劳强度基本一致,分析方法合理,结果可靠。AC4B铝合金的低周和高周疲劳强度均能满足缸盖的使用要求。
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| 关 键 词： | AC4B铝合金 疲劳强度 S-N曲线 |
Axial Fatigue Properties of AC4B Aluminum Alloy |
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| Zhang Minhong
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Cao Xibiao
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Qiao Shenglin
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Hua Qin.Axial Fatigue Properties of AC4B Aluminum Alloy[J].Special Casting & Nonferrous Alloys,2012,32(5):482-485. |
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| Authors: | Zhang Minhong Cao Xibiao Qiao Shenglin Hua Qin |
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| Affiliation: | 1(1.School of Materials Science and Engineering,Shanghai University;2.Kolbenschmidt Pierburg Shanghai Nonferrous Components Co.,Ltd) |
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| Abstract: | Fatigue tests in terms of high cycle of 107 and low cycle of 105 at 150 ℃ were carried out for the samples from gravity-casting C14 cylinder heads of AC4B aluminum alloy.The low cycle fatigue strength and high-cycle fatigue strength of AC4B aluminum alloy were presented by non-linear fitting and statistical method.The results show that high-cycle fatigue S-N curves follows second-order exponential decay form,meeting the "limited fatigue limit" condition,while low-cycle fatigue S-N curves is characterized by quadratic form.Low-cycle fatigue strength and high-cycle fatigue strength obtained are consistent by two kinds of ways,which shows that the analysis method is rational and reliable.Fatigue strengths of samples involving the low-cycle and high-cycle both meet the new Sail cars safety and reliability of Shanghai GM. |
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| Keywords: | AC4B Aluminum Alloy Fatigue Strength S-N Curve |
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