| 1. | Hysteresis energy is a useful basis for the establishment of failure criteria in fatigue .
在建立疲劳破坏准则时，迟滞能量是一个有用的依据。 |
| 2. | Half - life cyclic hysteresis energy decreases with the lowering of strain amplitude
这与css曲线和coffinmanson曲线的双线性特征具有相似的规律。 |
| 3. | We can see bilinear behavior from the relation - ? . diagram of fatigue life and total cyclic hysteresis energy as well as the fatigue life and half - life cyclic hysteresis energy . the divergent points both reside at the strain amplitude of 0
根据合金的循环硬化和软化行为，采用分段累积的方法计算材料的总滞?能比直接用半寿命滞?能乘以循环数得到的结果更符合实测值，而用疲劳特性参数计算总滞?能误差较大。 |
| 4. | In this paper , the low - cycle fatigue behavior of ni - base superalloy gh4145 / sq at 538 ? temperature , its microcosmic mechanisms and cyclic hysteresis energy are investigated . the influence of fatigue parameter on prediction of fatigue life is also discussed
本文主要研究了镍基合金gh4145 / sq在538温度下的低周疲劳行为、疲劳特性参数变化特征及其微观机制，初步探讨了低周疲劳特性参数波动对寿命预测结果的影响。 |
| 5. | The electrical cut scanning mirror shows : this bilinear behavior results from different cracking ways under high and low strain amplitudes , that is , elastic cracking and brittle cracking respectively . cyclic hysteresis energy is an important fatigue parameter . the total cyclic hysteresis energy of gh4145 / sq increases gradually as strain amplitude goes from 1 % to 0 . 5 % , but it decreases when strain amplitude is lower than 0 . 5 %
在高温低周疲劳下， gh4145 / sq合金的循环滞?能具有如下特征：在1 0 . 5应变幅范围内，循环总滞?能是一个逐渐增大的过程，而当应变幅小于0 . 5时，总滞?能随应变幅减小而趋于减小；半寿命处的循环滞迥能和总滞?能与寿命之间的关系曲线表现出双线性特征，转折点对应0 . 5应变幅。 |
| 6. | And finally , sem has been used to characterize the fracture . the results indicate that the relationship between the fatigue lifetime and cyclic plastic strain range obeys coffm - manson relation , and the relation between the hysteresis energy ( wn ) and the plastic strain range ( p ) can be described by a power - law : wh = h pw
但在室温下， r向及t向试样具有相同的循环特性，均表现为随应变幅的不同而不同，当应变幅高于0 . 8时，呈现出先循环硬化而后循环软化直至最后断裂的现象。 |
