n晶界(n=1、2、3)晶界比例進行統(tǒng)計并對隨機晶界網(wǎng)絡連通性進行表征。結(jié)果表明,隨著退火時間的延長,Σ3晶界比例基本保持不變,而Σ9和Σ27晶界比例卻出現(xiàn)較大幅度的變化,并且其峰值點都出現(xiàn)退火15min條件下。此刻,相應的隨機晶界網(wǎng)絡連通性被有效阻斷。這是由于非共格Σ3晶界的存在,產(chǎn)生了更多的Σ9和Σ27晶界,并且使得這些特殊晶界連接到隨機晶界網(wǎng)絡當中。而采用Σ(9+27)/Σ3比值可以更好的表征隨機晶界網(wǎng)絡的連通性。"/>

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Hastelloy C-276合金中Σ9和Σ27晶界與隨機晶界網(wǎng)絡連通性的關系
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東北大學軋制技術(shù)及連軋自動化國家重點實驗室,東北大學軋制技術(shù)及連軋自動化國家重點實驗室,北京有色金屬研究總院復合中心,北京有色金屬研究總院復合中心

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The relationships between the Σ9 and Σ27boundaies and the connectivity of random boundary in Hastelloy C-276
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The State key laboratory of rolling and automation,Northeastern University,The State key laboratory of rolling and automation,Northeastern University,Beijing General Research Institute for Nonferrous Metals,Beijing General Research Institute for Nonferrous Metals

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    摘要:

    Hastelloy C-276合金經(jīng)冷軋10%后進行1100℃不同時間的退火熱處理。采用EBSD技術(shù)對Σ3n晶界(n=1、2、3)晶界比例進行統(tǒng)計并對隨機晶界網(wǎng)絡連通性進行表征。結(jié)果表明,隨著退火時間的延長,Σ3晶界比例基本保持不變,而Σ9和Σ27晶界比例卻出現(xiàn)較大幅度的變化,并且其峰值點都出現(xiàn)退火15min條件下。此刻,相應的隨機晶界網(wǎng)絡連通性被有效阻斷。這是由于非共格Σ3晶界的存在,產(chǎn)生了更多的Σ9和Σ27晶界,并且使得這些特殊晶界連接到隨機晶界網(wǎng)絡當中。而采用Σ(9+27)/Σ3比值可以更好的表征隨機晶界網(wǎng)絡的連通性。

    Abstract:

    Hastelloy C-276 was subjected to 10% deformation and annealed at 1100°C for different times. The fractions of Σ3n(n=1,2,3) boundaries and the connectivity of random boundary networks were characterized by electron back-scatter diffraction (EBSD). The results showed that the Σ3 boundary fraction is hardly increasing during annealing time. Instead, the fractions of Σ9 and Σ27 boundaries have a dramatic change with annealing times, whose peaks are arisen at annealed 15min. Meanwhile, the corresponding connectivity of random boundary network is effectively disrupted. This can be attributed to the incoherent Σ3 boundary producing more Σ9 and Σ27 boundaries and incorporating those boundaries into the random boundary networks. Actually, the connectivity of random boundary networks can be definitely identified by Σ(9+27)/Σ3 radio.

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張曉宇,趙憲明,李德富,郭勝利. Hastelloy C-276合金中Σ9和Σ27晶界與隨機晶界網(wǎng)絡連通性的關系[J].稀有金屬材料與工程,2018,47(8):2318~2321.[ZHANG Xiaoyu, ZHAO Xianming, LI Defu, GUO Shengli. The relationships between the Σ9 and Σ27boundaies and the connectivity of random boundary in Hastelloy C-276[J]. Rare Metal Materials and Engineering,2018,47(8):2318~2321.]
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  • 收稿日期:2017-01-18
  • 最后修改日期:2017-03-07
  • 錄用日期:2017-03-15
  • 在線發(fā)布日期: 2018-10-17
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