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本文阐述了一种装置可精确地测定材料在综合高应变疲劳和温度高达700℃下的蠕变的循环应力——应变性能。伺服液压试验机的拉—压负荷容量为±20,000磅力,并且可以在应变循环或负荷循环状态下工作。试样的直径为0.5时,其平行的标距长度为1.5时,其端部有锥形截面的脊峰可在其上装延伸计,以测量与控制轴向应变用。在持续时间高达12小时中,保持应变恒定在±1×10~(-5)以内,其温度控制在±0.5℃以内。
This article describes a device that accurately measures the cyclic stress-strain behavior of a material for creep at high strain fatigue and temperatures up to 700 ° C. The servo-hydraulic tester has a pull-pressure load capacity of 20,000 pounds force and can operate in a strain cycle or a duty cycle. Sample diameter of 0.5, the parallel gauge length of 1.5, the tip of the cone-shaped cross-section of the peak can be installed in the extensometer to measure and control the axial strain. In the duration of up to 12 hours, keep the strain constant within ± 1 × 10 ~ (-5), the temperature control within ± 0.5 ℃.