1Cr18Ni9Ti不锈钢单轴饱和棘轮演化模型
Modeling Uniaxial Saturated Ratcheting Strain for 1Cr18Ni9Ti Stainless Steel
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摘要: 在常温与高温下,对1Cr18Ni9Ti不锈钢进行单轴应力控制下的棘轮循环试验,分析峰值应力、平均应 力、低应力循环历史及温度对饱和棘轮应变的影响.基于峰值应力与饱和棘轮应变的单调抛物率关系及棘轮门 槛应力值与温度的线性关系,利用单试样法建立了1Cr18Ni9Ti不锈钢常温和高温下的饱和棘轮演化模型.Abstract: A set of uniaxial ratcheting tests for 1Cr18Ni9Ti stainless steel were carried out at room and elevated temperatures. The effects of peak stress, mean stress, low cyclic stressing histories and temperature on saturated ratcheting (SR) strain were investigated. Based on the parabolic relation between peak stress and SR strain, and the linear relation between ratcheting stress and temperature, the saturated ratcheting evolution models at room and elevated temperatures were presented by using single-specimen method.
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Key words:
- mean stress /
- stainless steel /
- ratcheting strain /
- ratcheting stress /
- evolution model
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