Effect of pre-strain history on small crack growth under Low Cycle fatigue for JIS SFVQ1A steel
Effect of pre-strain history on small crack growth under Low Cycle fatigue for JIS SFVQ1A steel
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预应变历史对 JIS SFVQ1A 钢低周疲劳下小裂纹扩展的影响
DOI：
10.2472/jsms.60.210
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发表时间：
2011
期刊：
影响因子：
--
通讯作者：
T. Ogawa
中科院分区：
文献类型：
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作者：
Shota Hasunuma;Y. Miyata;K. Sakaue;T. Ogawa
对核电站压力容器用低合金钢JIS SFVQ1A钢进行了低周疲劳试验。利用醋酸纤维素复制品，详细研究了预应变历史对小裂纹萌生和扩展的影响。在总应变范围Δe恒定的试验条件下，Δe较大的试验，由于小裂纹萌生和聚并次数的不同，表面裂纹长度2c较小。在Δe=8%或16%的情况下施加预应变历史，其疲劳利用系数Uf小于0.2时，然后在Δe=2%的疲劳载荷下直到断裂。在这些试验中，除非发生裂纹合并，否则2c和Uf之间的关系是一致的。疲劳寿命的分散归因于小裂纹的聚集。应用断裂力学方法预测疲劳寿命，表征疲劳小裂纹的扩展行为。
Low cycle fatigue tests were performed for a low alloy steel, JIS SFVQ1A, used for pressure vessels of nuclear power plants. The effect of pre-strain history on the small crack initiation and growth was investigated in detail using cellulose acetate replicas. Under the tests in which the total strain range, Δe, is constant, surface crack length, 2c, was smaller for the tests with larger Δe due to the different numbers of small crack initiation and coalescence. The pre-strain histories were applied at Δe of 8 or 16% with its fatigue usage factor, UF, of less than 0.2, followed by fatigue loading at Δe = 2% until fracture. In these tests, the relationships between 2c and UF agreed with each other unless crack coalescence occurred. The scatter in fatigue life was attributed to the coalescences of small cracks. Fracture mechanics approach was applied to predict the fatigue lives and to characterize the growth behavior of small fatigue cracks.
利用超声波疲劳试验评价奥氏体不锈钢的千兆周疲劳性能
DOI：
--
发表时间：
2008
期刊：
Journal of Solid Mechanics and Materials Engineeying Vol.2
影响因子：
--
作者：
Masashi Oonishi;Izuru Nishikawa;Yoshiteru Hainiwa Izuru Nishikawa;Yoshiteru Hainiwa Izuru Nishikawa;Yoshiteru Hainiwa Izuru Nishikawa;Yoshiteru Hainiwa Izuru Nishikawa;Yoshiteru Hainiwa Izuru Nishikawa;Yoshiteru Hainiwa Izuru Nishikawa;Kyouhei TAKAHASHI
通讯作者：
Kyouhei TAKAHASHI
奥氏体不锈钢疲劳裂纹萌生过程的AFM观察
DOI：
--
发表时间：
2004
期刊：
日本材料学会・第27回疲労シンポジウム講流論文集
影响因子：
--
作者：
Y.J.Liu;T.Inamura;N.Takezawa;H.Gomyo;岸本 学
通讯作者：
岸本 学