Effect of Cavity Growth Rate and Cr on High Temperature Crack Growth in P92 and P122 Steels
Effect of Cavity Growth Rate and Cr on High Temperature Crack Growth in P92 and P122 Steels
复制标题
空洞生长速率和 Cr 对 P92 和 P122 钢高温裂纹扩展的影响
DOI：
10.1142/s0217979203019423
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发表时间：
2003
影响因子：
1.7
通讯作者：
C. Jeong
中科院分区：
文献类型：
--
作者：
B. Lim;C. Jeong
本文用da/dt-Ct关系研究了新研制的P92和P122钢的高温裂纹扩展速度。通过测量孔洞的尺寸和密度，研究了孔洞对裂纹扩展速率和载荷线位移速率的影响，进而分析了孔洞对裂纹形核和扩展的影响。由于温度和应力变化在高温下特别重要，因此在不同温度和Ki（初始应力强度因子）下评估裂纹扩展行为。通过测定裂纹扩展激活能的方法评价了Cr含量对裂纹扩展的影响.
In this work, the velocity of crack propagation at high temperature was investigated with da/dt-Ct relationship using recently developed P92 and P122 steels. Role of cavity in crack growth rate and load line displacement rate was studied by measuring the cavity size and density, which will influence crack nucleation and growth. Since temperature and stress changes are particularly important at high temperature, crack growth behavior was evaluated under various temperature and Ki(initial stress intensity factor). Effect of Cr content was evaluated by measuring crack growth activation energy in thesis.