Characteristics of Surface Crack Growth in Rotating Bending Tests of Age-hardened or Annealed Al-alloy
Characteristics of Surface Crack Growth in Rotating Bending Tests of Age-hardened or Annealed Al-alloy
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时效硬化或退火铝合金旋转弯曲试验中表面裂纹扩展特征
DOI：
10.1299/jsme1958.28.385
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发表时间：
1985
期刊：
影响因子：
--
通讯作者：
N. Kawagoishi
中科院分区：
文献类型：
--
作者：
H. Nisitani;N. Kawagoishi
进行旋转弯曲疲劳试验来评估时效硬化铝合金和退火铝合金的表面裂纹扩展特性，获得的主要结果如下： (1) 退火铝合金的齿条扩展速率由以下方程表示。 dl/dN = Cσn 1 (C, n : 材料常数 ) 普通样品失效的循环次数可以通过该方程估计。 (2)对于时效硬化铝合金，当裂纹较短时，表面裂纹沿滑移带快速扩展，然后裂纹呈之字形扩展，此时裂纹扩展速率的增加较低。
Rotating bending fatigue tests were carried out to evaluate the characteristics of surface crack growth in an age-hardened Al-alloy and an annealed Al-alloy The main results obtained are as follows : (1) The rack growth rate in an annealed Al-alloy is expressed by the following equation. dl/dN = Cσn 1 (C, n : material constants ) The number of cycles to failure of a plain specimen can be estimated by this equation. (2) In case of an age-hardened Al-alloy, a surface crack propagates rapidly along a slip band when the crack is short, and then the crack propagates zigzag, in that time the increase in the crack growth rate is low.