摘要
对16Cr3NiWMoVNbE结构钢在25,100,200,300,350℃下进行了应变比为-1的总应变控制的低周疲劳(LCF)试验,研究了不同温度下该结构钢的循环应力响应、疲劳寿命和循环应力-应变行为。结果表明:试验钢在温度不高于200℃时,表现出循环软化的现象,而在300℃时,表现出明显的循环硬化现象;随着温度的升高,疲劳寿命有下降的趋势,利用三参数幂函数公式能较好地表征不同温度下的应变-寿命关系。
The total strain-controlled low cycle fatigue（LCF） tests at strain ratio of --1 were performed on a structural steel 16Cr3NiWMoVNbE at 25, 100, 200, 300, 350 ℃. The cyclic stress response, fatigue life and cyclic stress-strain behaviors of 16Cr3NiWMoVNbE steel at different temperatures were investigated. The results indicate that the steel represented cyclic softening at the temperature no higher than 200 ℃ and cyclic hardening while the temperature was 300 ℃. When the temperature rose, the fatigue life shortened. The relationship between strain and life can be described well by three-parameter power function at different temperatures.
出处
《机械工程材料》
CAS
CSCD
北大核心
2014年第2期44-47,53,共5页
Materials For Mechanical Engineering
