新聞資訊
TC21鈦合金的熱壓縮變形行為及變形機理
發布人：上海艾荔艾金屬材料有限公司www.jshcn.cn
更新時間：2015-12-13
對TC21合金的熱變形行為進行研究，通過對該合金變形過程中應變速率敏感性指數m值、熱變形激活能Q、晶粒指數P的計算，得出不同應變速率和溫度下m值、Q值和P值的變化規律。在繪制動態DMM模型熱加工圖的同時構建含位錯數量的雙相鈦合金高溫變形機理圖。
TC21鈦合金的熱壓縮變形行為及變形機理Hot compression deformation and?deformation mechanisms of TC21 alloy
對TC21合金的熱變形行為進行研究，通過對該合金變形過程中應變速率敏感性指數m值、熱變形激活能Q、晶粒指數P的計算，得出不同應變速率和溫度下m值、Q值和P值的變化規律。在繪制動態DMM模型熱加工圖的同時構建含位錯數量的雙相鈦合金高溫變形機理圖。應用熱加工圖分析TC21合金熱變形工藝，確定加工失穩區以及適合加工區域。運用雙相鈦合金高溫變形機理圖，根據不同溫度下TC21合金柏氏矢量補償的晶粒尺寸、模量補償的應力值和位錯數量預報該合金的熱變形機理。
The hot compression deformation of TC21 alloy was investigated. Throngh the calculation of strain rate sensitivity exponent (m), deformation activation energy (Q) and grain size exponent (P) during hot compression deformation, the variations of?m,?Q?and?P?values at different strain rates and temperatures were obtained. The hot processing map based on the dynamic materials modeling was drawn while the high-temperature deformation mechanism maps incorporating dislocations inside grains were obtained. The processing map was used to analyze the hot deformation behavior and determine the processing instability regime and appropriate processing regimes. Within appropriate processing regime, based on the elevated temperature deformation mechanism maps, the Burgers vector compensated grain size, modulus compensated stress and dislocation quantities of TC21 alloy at different temperatures were calculated to elucidate the hot deformation mechanisms.
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