Fatigue process of SiC whisker reinforced aluminum alloy and its mechanical characteristics

SiC晶须增强铝合金的疲劳过程及其力学性能

• 批准号: 02452095
• 负责人: NISITANI Hironobu
• 金额: $ 4.42万
• 依托单位: KYUSYU UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1990
• 资助国家: 日本
• 起止时间: 1990 至 1991
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-02452095/
• 关键词: Composites; Metal Matrix Composites; Fatigue; Rotating Bending; Succsessive Observation; SiC Whisker; Notch

In this research, rotating-bending fatigue tests of the SiC whisker reinforced 6061-T6 aluminum alloy and 6061-T6 aluminum alloy made by powder metallurgy were carried out to investigate the fatigue characteristics of plain and notched specimens at room temperature. The fatigue mechanisms in both materials were clarified through successive surface observations using the plastic replica method. The results were discussed based on linear notch mechanics. In the case of the SiC whisker reinforced composites, whisker rich zone and poor zone exist and the fatigue crack nucleates from the end of the whisker near the boundary. On the other hand, in the case of the aluminum alloy, the fatigue crack nucleates from defect, and propagates by shear type. The fatigue strength of notched specimens of this material may be estimated from the concept of linear notch mechanics.

本研究对SiC晶须增强6061-T6铝合金和粉末冶金6061-T6铝合金进行了旋转弯曲疲劳试验，研究了普通试样和缺口试样的室温疲劳特性。通过使用塑料复制品方法进行连续的表面观察，阐明了两种材料的疲劳机制。基于线性缺口力学对结果进行了讨论。对于SiC晶须增强复合材料，存在晶须富集区和贫晶区，疲劳裂纹从靠近边界的晶须端部形核。另一方面，在铝合金的情况下，疲劳裂纹从缺陷成核，并通过剪切方式扩展。这种材料的缺口试样的疲劳强度可以根据线性缺口力学的概念来估计。

项目成果

Hironobu NISITANI, Yun-Hae KIM, Hiroshi NOGUCHI and Akio NISHIZAWA: "Fatigue strength of plain and notched specimens of SiC whisker reinforced aluminum alloy in comparison with aluminum alloy." Transactions of the Japan Society of Mechanical Engineers.

Hironobu NISITANI、Yun-Hae KIM、Hiroshi NOGUCHI 和 Akio NISHIZAWA：“SiC 晶须增强铝合金的平面和缺口样品的疲劳强度与铝合金的比较。”

西谷・金・野口・西澤: "SiCウィスカ強化アルミニウム合金の平滑材および切欠材の疲労強度について" 日本機械学会論文集A編.

Nishitani、Kane、Noguchi 和 Nishizawa：“关于光滑和有缺口的 SiC 晶须强化铝合金的疲劳强度”，日本机械工程师学会会议录，A 版。

Hironobu NISITANI, Yun-Hae KIM, Hiroshi NOGUCHI and Akio NISHIZAWA: "Fatigue process of SiC whisker reinforced aluminum alloy." Preprint of the Japanese Society of Mechanical Engineers Meeting in Nagoya. A. 328-330 (1991)

Hironobu NISITANI、Yun-Hae KIM、Hiroshi NOGUCHI 和 Akio NISHIZAWA：“SiC 晶须增强铝合金的疲劳过程。”

Hironobu NISITANI, Yun-Hae KIM, Hiroshi NOGUCHI and Akio NISHIZAWA: "Fatigue strength of notched specimens of SiC whisker reinforced aluminum alloy." Preprint of the Japanese Society of Mechanical Engineers Meeting in Kanazawa. B. 309-311 (1991)

Hironobu NISITANI、Yun-Hae KIM、Hiroshi NOGUCHI 和 Akio NISHIZAWA：“SiC 晶须增强铝合金缺口样品的疲劳强度。”

西谷・金・野口・西澤: "SiCウィスカ強化アルミニウム合金の切欠き材の疲労強度" 日本機械学会材料力学講演会講演論文集. Vol.B. 309-311 (1991)

Nishitani、Kane、Noguchi 和 Nishizawa：“SiC 晶须强化铝合金的缺口材料的疲劳强度”日本机械工程师学会材料力学会议论文集，第 309-311 卷（1991 年）。