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Delta工藝Inconel 718合金熱變形條件下的流變行為
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更新時間：2015-09-21
在Gleeble?3500熱模擬實驗機(jī)上對Delta工藝Inconel 718合金進(jìn)行高溫壓縮實驗，研究其高溫壓縮變形的流變應(yīng)力行為。
Delta工藝Inconel 718合金熱變形條件下的流變行為Flow stress behavior of delta-processed?Inconel 718 superalloy under hot compression deformation
在Gleeble?3500熱模擬實驗機(jī)上對Delta工藝Inconel 718合金進(jìn)行高溫壓縮實驗，研究其高溫壓縮變形的流變應(yīng)力行為。結(jié)果表明：δ相時效態(tài)Inconel 718合金在本實驗條件下具有正的應(yīng)變速率敏感性，流變應(yīng)力隨著應(yīng)變速率的降低和變形溫度的升高而減小，動態(tài)再結(jié)晶是合金重要的軟化機(jī)制。δ相時效態(tài)Inconel 718合金的熱變形激活能為497.407 kJ/mol，高溫壓縮峰值流變應(yīng)力與變形溫度和應(yīng)變速率的關(guān)系可用雙曲正弦函數(shù)表示。
The flow stress behavior of the delta-processed Inconel 718 superalloy was investigated by the hot compression on Gleeble?3500 test machine. The results of the thermal simulation compression tests show that the flow stress is positively sensitive to the strain rate and the deformation temperature. The peak stress decreases with the decreasing strain rate and increasing deformation temperature. The dynamic recrystallization is the main softening mechanism of the hot deformation of the delta-processed Inconel 718 superalloy. The activation energy (Q) of the delta-processed δ phase aged Inconel 718 superalloy is 497.407 kJ/mol. The relationships among the flow stress, the deformation temperature and the strain rate for the delta-processed Inconel 718 can be described by the hyperbolic sine-type function.
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