High temperature, low cycle fatigue of IN-100 superalloy II: Influence of frequency and environment at high temperatures
High temperature, low cycle fatigue of IN-100 superalloy II: Influence of frequency and environment at high temperatures
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DOI：
10.1016/0921-5093(88)90050-0
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发表时间：
1988-05
期刊：
影响因子：
6.4
通讯作者：
M. Reger;L. Rémy
中科院分区：
文献类型：
--
作者：
M. Reger;L. Rémy
铸造镍基高温合金IN-100的低周疲劳试验在1000°C空气中进行，采用宽频率范围（4 × 10−3−2 Hz）的应变循环和拉伸应变保持时间试验。在相同的温度下，在真空下进行试验，研究了环境的影响。在5 × 10− 2 ~ 1 Hz范围内，低周疲劳寿命与频率有很强的相关性。在真空中进行试验的疲劳寿命比在空气中长得多，只是试验频率较高。裂纹扩展速率的数据进行了测量，使用的电位降技术，并被用来表明，在空气中的疲劳寿命是由裂纹扩展和评估的氧化效应的影响。
Low cycle fatigue tests on cast nickel-based superalloy IN-100 were conducted at 1000°C in air using sawtooth strain cycles over a wide range of frequencies (4 × 10−3−2 Hz) and tensile strain hold time tests. The influence of environment was investigated using tests under vacuum at the same temperature. The low cycle fatigue life was found to be strongly frequency dependent between 5 × 10−2and 1 Hz. Testing in vacuum results in a much longer fatigue life than in air except for the higher test frequency. Crack growth rate data were measured using the potential drop technique and were used to show that the fatigue life in air is dominated by crack growth and to assess the influence of oxidation effects.