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小變形高溫退火對Hastelloy C-276合金晶界特征分布和晶界平面分布的影響
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北京有色金屬研究總院加工事業(yè)部,北京有色金屬研究總院加工事業(yè)部,北京有色金屬研究總院加工事業(yè)部,東北大學(xué)軋制技術(shù)及連軋自動化國家重點實驗室

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國家自然科學(xué)基金資助(項目號No. 50834008)


Low-strains high temperature annealing effect on the grain boundary character distributions and the grain boundary plane distributions of Hastelloy C-276
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Beijing General Research Institute for Nonferrous Metals,Beijing General Research Institute for Nonferrous Metals,Beijing General Research Institute for Nonferrous Metals,The State key laboratory of rolling and automation,Northeastern University

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    摘要:

    Hastelloy C-276合金經(jīng)1150℃ 30min固溶處理后，進行不同變形量的冷軋高溫退火處理。采用電子背散射（EBSD）技術(shù)對退火后的晶界特征分布和晶界面分布進行表征。結(jié)果表明，在退火過程中，Σ1小角度晶界比例減小，變形存儲能釋放，晶界發(fā)生遷移，促進了晶界相互作用，從而導(dǎo)致Σ9和Σ27晶界比例增加。與此同時，晶粒發(fā)生異常長大并促進了特殊晶界的形成，產(chǎn)生的特殊晶界阻斷了大角度晶界的連通性。合金經(jīng)變形高溫退火之后，Σ3晶界分布在{111}晶界面扭轉(zhuǎn)晶界，Σ9晶界分布在[110]晶帶傾斜晶界。不同變形條件下，Σ3晶界面與Σ9晶界面分布演變規(guī)律不同，原因在于變形退火導(dǎo)致Σ3晶界比例的不同和晶界之間的相互作用的結(jié)果。

    Abstract:

    Hastelloy C-276 was solution-treated at 1150℃ for 30min, after that, the samples were subjected to cold rolling with different reductions and annealing at high temperature. The grain boundary character distribution(GBCD) and the grain boundary plane distribution were characterized by electron backscatter diffraction (EBSD) technique. The results shown the fraction of Σ1 boundary was decreasing during annealing process. Meanwhile, the fraction of Σ9 boundary and Σ27 boundary was increasing. This is due to the stored energy was exposed to the migration of grain boundaries and promoting the interaction of grain boundaries. While grain size grew up abnormally during heat treatment, that led to the formation of special boundary. The special boundaries disrupted the connectivity of high angle boundaries. After the low-strains higher temperature annealing process, Σ3 boundaries with the {111} plane were twist boundaries and Σ9 boundaries with the [110] zone were tilt boundaries. Under different deformation conditions, the distribution of Σ3 grain boundary plane was different from Σ9 grain boundary plane, due to the proportion of Σ3 grain boundaries was different and the interactions of special boundaries were occurred.

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張曉宇,李德富,郭勝利,趙憲明.小變形高溫退火對Hastelloy C-276合金晶界特征分布和晶界平面分布的影響[J].稀有金屬材料與工程,2016,45(7):1866~1870.[ZHANG Xiaoyu, LI Defu, GUO Shengli, ZHAO Xianming. Low-strains high temperature annealing effect on the grain boundary character distributions and the grain boundary plane distributions of Hastelloy C-276[J]. Rare Metal Materials and Engineering,2016,45(7):1866~1870.]
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  • 收稿日期:2015-08-25
  • 最后修改日期:2015-10-12
  • 錄用日期:2015-11-18
  • 在線發(fā)布日期: 2016-10-09
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