cyclic strain softening 中文意思是什麼
cyclic strain softening
解釋
周期應變軟化-
It can be noticed that both r and t specimens show initial hardening and subsequent softening at the strain amplitude higher than 0. 8 % and cyclic softening from the beginning to fracture under strain amplitude less than 0. 8 % at room temperature, and the cyclic flow stress was always lower in r specimen than in t specimen at the same strain range
且在相同的應變幅下， t向試樣比r向試樣具有更高的循環流變應力。此外，對r向及t向試樣，低應變幅下呈現出循環軟化現象是因為晶粒旋轉導致循環軟化；而在高應變幅下發生循環硬化是由於孿晶作用的結果。 -
The experimental results is shown as followings : ( 1 ) the cyclic flow stress - strain curves in an incremental step test could be expressed as the power law relation : ( 2 ) when the strain amplitude is lower during cyclic deformation tests under constant strain control, softening firstly appears, then gradually hardens with the increasing numbers of cycle ; when the strain amplitude is higher, hardening firstly appears, then gradually softens
試驗結果表明： （ 1 ）循環流變應力與應變的相互關系曲線均符合冪律關系式： （ 2 ）在室溫下進行恆應變幅循環變形過程中，當所控制的應變幅較小時，該材料首先出現循環軟化，之後隨循環周次的增加直至循環失效前該材料出現了硬化現象。當應變幅較大時，該材料開始出現硬化，然後隨循環周次的增加才出現軟化。 -
The results showed that the characteristics of cyclic hardening or softening depend to the strain loading paths and the loading parameters
研究結果表明，低周拉扭疲勞加載下，拉與扭應加響應的硬化與軟化特性取決于應變加載路徑和加載參數。 -
The alloys, which were cold - worked followed by recrystallization annealing, display cyclic softening in the range of low strain because the cyclic stress - strain curve lies below the monotonic stress - strain curve, and show cyclic hardening in the range of high strain because the cyclic stress - strain curve lies above the monotonic stress - strain curve
在低應變范圍，冷加工后經再結晶退火處理的錯合金的循環應力一應變曲線位於單調拉伸曲線的下方，表現為循環軟化;在高應變范圍則位於單調拉伸曲線的上方，表現為循環硬化。 -
The second stage is a cyclic softening course, and what ' s more, the greater the strain amplitude, the greater the trend of softening
在所有試驗條件下合金的疲勞硬化階段都很短暫，疲勞壽命的極大部分是消耗在緩慢的循環軟化階段。 -
The last stage is a rapid softening course for all strain amplitude. further metallic phase shows : for all strain - controlled, the initial rapid cyclic hardening results from the strong interaction between precipitate strengthening phase and the dislocation ; as for strain amplitude lower than 0. 95 %, the shearing of precipitate strengthening phase leads to the cyclic softening behavior
金相組織結構檢查進一步表明，循環塑性應變作用將顯著改變原始態合金中沉澱顆粒的幾何形狀、尺寸和分佈狀態，並由此改變位錯與顆粒之間的交互作用行為，這一機制將對合金的循環硬化和軟化起促進作用。 -
In addition, the cyclic softening under the strain amplitude less than 0. 8 % can be explained by " grain - rotation induced cyclic softening ", and the cyclic hardening in the higher strain amplitude was attributed to twinning
在低應變幅區，合金在室溫下的低周疲勞性能明顯優于在400下的低周疲勞性能。但隨著應變幅的增加，室溫和400下合金的疲勞壽命趨于接近。 -
For the cyclic deformation under a given strain at room temperature, cyclic softening is usually displayed till to failure in the lower range of strain ; however, cyclic hardening is displayed in the early stage in the higher range of strain, subsequent cyclic softening in the later stage and till to failure
對于室溫下恆應變幅的循環變形，在應變幅較低時表現為循環軟化直至疲勞破壞;在應變幅較高時，循環變形的初期為循環硬化，隨后是循環軟化直至疲勞破壞。
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