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GH4098合金短時(shí)持久性能的研究
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國(guó)家高技術(shù)研究發(fā)展計(jì)劃項(xiàng)目 (2012AA03A513)；教育部支撐技術(shù)重點(diǎn)項(xiàng)目 (625010337)；國(guó)家重點(diǎn)基礎(chǔ)研究發(fā)展計(jì)劃(2010CB631201)


Short Time Stress Rupture Property in GH4098 Alloy
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    摘要:

    以固溶加時(shí)效處理后的GH4098合金板材為研究對(duì)象，測(cè)定其在不同溫度（800~1000 ℃）、不同應(yīng)力（90~680 MPa）條件下的短時(shí)持久性能（持久斷裂時(shí)間10 min~3 h），并對(duì)其顯微組織和斷裂特征進(jìn)行表征。結(jié)果表明：GH4098合金在800~1000 ℃范圍內(nèi)持久斷裂模式均為沿晶塑性斷裂。隨著溫度的升高，GH4098合金短時(shí)持久性能逐漸降低，但在1000 ℃持久性能退化程度明顯加劇。組織表征結(jié)果表明：GH4098合金晶粒尺寸并未隨著溫度的升高而變化，而高溫下合金中γ’相體積分?jǐn)?shù)的降低以及γ’相和晶界碳化物的粗化是合金短時(shí)持久性能顯著退化的主要原因。同時(shí)，對(duì)冷卻速度對(duì)合金顯微組織的影響以及短時(shí)蠕變與傳統(tǒng)蠕變的異同也進(jìn)行了討論

    Abstract:

    Short time stress rupture properties (10 min~3 h) of GH4098 alloy have been investigated at different temperatures (800~1000 °C) and stresses (90~680 MPa) after solution and aging treatment, combined with the characterization of microstructures and fracture features. The results show that fracture features of GH4098 alloy are ductile and intergranular in all temperature range. Short time stress rupture properties of the alloy degrade gradually with increasing the testing temperature, but they are significantly worse at 1000 °C. Microstructural characterization indicates that there is little change in grain size with increasing the temperature. The deterioration of short time stress rupture properties at higher temperature is ascribed to the reduction of γ’ volume fraction as well as the coarsening of γ’ precipitates and grain boundary carbides. In addition, the influence of cooling rate on microstructures as well as the differences between short time creep and traditional creep was also discussed

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袁曉飛,丁賢飛,八木晃一,鄭運(yùn)榮,馮 強(qiáng). GH4098合金短時(shí)持久性能的研究[J].稀有金屬材料與工程,2015,44(10):2419~2428.[Yuan Xiaofei, Ding Xianfei, Yagi Koichi, Zheng Yunrong, Feng Qiang. Short Time Stress Rupture Property in GH4098 Alloy[J]. Rare Metal Materials and Engineering,2015,44(10):2419~2428.]
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  • 收稿日期:2014-10-27
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  • 在線發(fā)布日期: 2016-07-13
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