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首页> 美国政府科技报告 >HIGH TEMPERATURE, LOW CYCLE FATIGUE OF COPPER-BASE ALLOYS IN ARGON;PART III ZIRCONIUM-COPPER;THERMAL MECHANICAL STRAIN CYCLING, HOLD-TIME AND NOTCH FATIGUE RESULTS
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HIGH TEMPERATURE, LOW CYCLE FATIGUE OF COPPER-BASE ALLOYS IN ARGON;PART III ZIRCONIUM-COPPER;THERMAL MECHANICAL STRAIN CYCLING, HOLD-TIME AND NOTCH FATIGUE RESULTS

机译：argen中铜基合金的高温，低周疲劳;第III部分锆 - 铜;热机械应变循环，保持时间和缺口疲劳结果

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The low-cycle fatigue characteristics of smooth bar and notched bar specimens(hourglass shape) of zirconium-copper,1/2 Hard, material (R-2 Series) were evaluated at room temperature in axial strain control. Over the fatigue life range from about 300 to 3000 cycles the ratio of fatigue life for smooth bar to fatigue life for. notched bar remained constant at a value of about 6.0.nSome additional hold-time data for the R-2 alloy tested in argon at 538℃ are reported. Hold period durations to 300 seconds were employed in tests involving a hold period in tension only, compression only, and in both tension and compression. These tests were performed to study the effects of hold period durations which were longer than those employed in the previous task. An analysis of the relaxation data obtained in these hold-time tests is also reported and it is shown that these data yield a fairly consistent correlation in terms of instantaneous stress rate divided by instantaneous stress.

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