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雙相NiAl金屬間化合物超塑性
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國家自然科學基金(59895150);江蘇省人事廳“六大人才高峰”項目(07-A-009)


Superplasticity in Dual-Phase NiAl Intermetallics
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    摘要:

    研究雙相Ni-31Al金屬間化合物的高溫變形行為。 結(jié)果表明,該合金在950~1075 ℃溫度范圍,1.25×10-4~ 8×10-3s-1應(yīng)變速率范圍內(nèi)呈超塑性變形。在溫度為1000 ℃、應(yīng)變速率為5×10-4 s-1時,最大延伸率可達281.3%。顯微結(jié)構(gòu)分析表明,超塑性變形過程中兩相具有很好的協(xié)調(diào)變形能力,超塑性變形后原始組織拉長、細化。雙相Ni-31Al金屬間化合物超塑性變形機制可能為連續(xù)動態(tài)回復與再結(jié)晶

    Abstract:

    Deformation behavior of dual-phase Ni-31Al intermetallics at high temperature was investigated. Results show that the alloy exhibits superplastic deformation behavior at the initial strain rate of 1.25×10-4- 8×10-3 s-1 and in the temperature range of 950-1075 oC. A maximum elongation of 281.3% is obtained at 5×10-4 s-1 and 1000 oC. Microstructure analyses show that the dual phases have excellent compatible deformability during the superplastic deformation process. The initial coarse microstructure becomes much longer and finer after superplastic deformation. The superplastic phenomenon in dual-phase Ni-31Al can be explained by continuous dynamic recovery and recrystallization

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胡 靜,林棟樑.雙相NiAl金屬間化合物超塑性[J].稀有金屬材料與工程,2011,40(5):817~819.[Hu Jing, Lin Dongliang. Superplasticity in Dual-Phase NiAl Intermetallics[J]. Rare Metal Materials and Engineering,2011,40(5):817~819.]
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  • 收稿日期:2010-05-21
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