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Hf含量對(duì)DD6單晶高溫合金組織和持久性能的影響
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Effect of Hf Content on the Microstructures and Stress Rupture Properties of DD6 Single Crystal Superalloy
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    摘要:

    研究了Hf含量對(duì)DD6單晶高溫合金熱處理組織和持久性能的影響。結(jié)果表明，在本實(shí)驗(yàn)研究范圍內(nèi)，隨著Hf含量的增加，熱處理后合金殘余共晶量增加，枝晶干的γ′相尺度無(wú)明顯變化，枝晶間的γ′相尺度有所減小。在1100 ℃, 140 MPa條件下，隨著Hf含量的增加，合金的持久壽命先升高后降低, 持久延伸率先快速增加, 然后慢速增加。討論了不同Hf含量合金的顯微組織與持久性能的關(guān)系

    Abstract:

    The effect of Hf content on the microstructures after heat treatment and stress rupture properties of DD6 single crystal superalloy was investigated. The results show that with increasing of Hf content in the range of current research, the residual γ/γ′ eutectic increases apparently, the size of γ′ particles in dendritic cores has no obvious change and that in interdendritic decreases after heat treatment. With the increase of Hf content, the stress rupture life increases at first and decreases afterwards, and the elongation displays fast increasing first, and slow rising afterwards at 1100 oC, 140 MPa. At last the relationship between the microstructures and stress rupture properties of DD6 alloy with different Hf contents was discussed

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史振學(xué),李嘉榮,劉世忠,駱宇時(shí),趙金乾. Hf含量對(duì)DD6單晶高溫合金組織和持久性能的影響[J].稀有金屬材料與工程,2010,39(8):1334~1338.[Shi Zhenxue, Li Jiarong, Liu Shizhong, Luo Yushi, Zhao Jinqian. Effect of Hf Content on the Microstructures and Stress Rupture Properties of DD6 Single Crystal Superalloy[J]. Rare Metal Materials and Engineering,2010,39(8):1334~1338.]
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  • 收稿日期:2009-09-01
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