铸造铝合金ZL116持久寿命预测探讨
Prediction discussion about stress rupture life of ZL116 cast aluminum allov
臧昊良 1崔文明 1李铸铁 1张晓辰 1张凯 1王纪兴1
作者信息
- 1. 国合通用(青岛)测试评价有限公司,山东青岛 266042
- 折叠
摘要
通过一系列持久试验研究了铸造铝合金ZL116在200 ℃不同应力条件下的持久寿命,并采用等温线外推法模型和线性回归运算得到持久寿命双对数应力-时间曲线,获得了中值曲线公式、50％置信度99.9％存活率曲线公式和95％置信度97.7％存活率曲线公式,并将ZL116在200 ℃时的理论计算数据与试验数据进行比对.结果表明:理论计算数据与试验数据吻合良好,实现了通过给定持久强度预测持久寿命的可能性,节约了设计成本,提高了设备安全性.
Abstract
The stress rupture life of ZL116 cast aluminum alloy under different stress conditions at 200 ℃ was studied through a series of stress rupture tests.The double logarithmic stress-strain curve of stress rupture life was obtained by iso-therm extrapolation model and linear regression operation.The median curve formula,50％confidence 99.9％survival rate curve formula,and 95％confidence 97.7％survival rate curve formula were obtained.The theoretical calculation data of ZL116 at 200 ℃ were compared with the experimental data.The results showed that the theoretical calculation data matched well with the experimental data,realizing the possibility of predicting the stress rupture life through the given dura-bility strength.This pethood could save design costs and improve the equipment safety.
关键词
ZL116/持久寿命预测/蠕变断裂/持久强度Key words
ZL116/stress rupture life prediction/creep fracture/stress rupture strength引用本文复制引用
出版年
2024
NETL
NSTL
万方数据