Low cycle fatigue behaviour of duplex stainless steel: influence of isothermal aging treatment
Low cycle fatigue behaviour of duplex stainless steel: influence of isothermal aging treatment
复制标题
双相不锈钢的低周疲劳行为：等温时效处理的影响
DOI：
--
复制
发表时间：
2010
期刊：
影响因子：
--
通讯作者：
H. Christ
中科院分区：
文献类型：
--
作者：
J. Sahu;R. Ghosh;H. Christ
通过机械测试、扫描和透射电子显微镜对双相不锈钢在标准热处理和等温时效（在475 ℃下100 h）条件下的低周疲劳行为进行了比较研究。结果表明，与退火条件相比，在总应变幅Δ T/2较低值（Δ T/2 = 4.0 x 10-3和6.0 x 10-3）下，老化条件下的疲劳寿命更长，在Δ T/2 = 8.0 x 10-3时，退火和老化条件下的疲劳寿命相似。材料的抗疲劳性随着δ ε/2值的增加而收敛，这是由于在老化条件下铁素体相的快速循环软化。
The low-cycle fatigue behaviour of a duplex stainless steel was comparatively studied in standard heat-treated and isothermally aged (at 475 degrees C for 100 h) conditions by mechanical testing, scanning and transmission electron microscopy. It was established that fatigue life is longer in the aged condition as compared to the annealed condition at lower values of total strain amplitude delta epsilon/2 (delta epsilon/2 = 4.0 x 10-3 and 6.0 x 10-3) and becomes similar in annealed and aged conditions at delta epsilon/2 = 8.0 x 10-3. Fatigue resistance of the material converges with increase in delta epsilon/2 values as a result of rapid cyclic softening of the ferritic phase in the aged condition.