Characterization of Structural Embrittlement of Creep Crack Growth for W-Added 12%Cr Ferritic Heat-Resistant Steel Related to the Multiaxial Stress
Characterization of Structural Embrittlement of Creep Crack Growth for W-Added 12%Cr Ferritic Heat-Resistant Steel Related to the Multiaxial Stress
复制标题
表征%20of%20结构%20脆化%20of%20蠕变%20裂纹%20生长%20为%20W-添加%2012%Cr%20铁素体%20耐热%20钢%20相关%20至%20%20多轴%20应力
DOI：
10.1115/1.3026544
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发表时间：
2009
影响因子：
1.2
通讯作者：
T. Adachi
中科院分区：
文献类型：
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作者：
R. Sugiura;A. Yokobori;M. Tabuchi;A. Fuji;T. Adachi
在静态蠕变加载条件下，由于塑性约束，构件出现多轴应力场，并产生更脆的开裂行为。从实用的角度来看，多轴应力场下蠕变裂纹扩展速率的表征对于改进蠕变延寿方法具有重要意义。采用带有尖锐圆形缺口的圆棒试样对加钨12%Cr铁素体耐热钢（W 12%Cr钢）进行了蠕变裂纹扩展试验，研究了多轴度对蠕变塑性和蠕变裂纹扩展速率的影响。此外，三维弹塑性蠕变有限元分析进行澄清的多轴性蠕变裂纹扩展的影响。
In components under static creep loading condition, the multiaxial stress fields appear due to the plastic constraint and they produce a more brittle type cracking behavior. From a practical standpoint, the characterizations of creep crack growth rates under the multiaxial stress field are important to improve the methods for creep life extension. In this paper, creep crack growth tests were conducted using round bar specimens with sharp circular notches for tungsten-added 12%Cr ferritic heat-resistant steel (W12%Cr steel), and the effect of multiaxiality on creep ductility and creep crack growth rate were investigated. Furthermore, three-dimensional elastic-plastic creep finite element analyses were conducted to clarify the effect of multiaxiality on creep crack growth.
Y. Murakami：“核原癌基因 c-jun 和 c-fos，作为 DNA 复制的调节因子。”
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