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低溫時效對鈹材尺寸穩(wěn)定性的影響
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1.中南大學(xué) 材料科學(xué)與工程學(xué)院，湖南 長沙 410083;2.有色金屬材料科學(xué)與工程教育部重點(diǎn)實(shí)驗(yàn)室，湖南 長沙 410083

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基金項(xiàng)目:

National Defense Basic Scientific Research Program of China (JCKY2018203B067); Youth Natural Science Foundation of Hunan Province (2019JJ50817)


Effects of Low-Temperature Aging on Dimensional Stability of Beryllium
Author:
Affiliation:

1.School of Materials Science and Engineering, Central South University, Changsha 410083, China;2.Key Laboratory of Non-ferrous Materials Science and Engineering, Ministry of Education, Changsha 410083, China

Fund Project:

National Defense Basic Scientific Research Program of China (JCKY2018203B067); Youth Natural Science Foundation of Hunan Province (2019JJ50817)

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    摘要:

    利用拉曼光譜儀、納米壓痕儀、電子背散射衍射電鏡以及透射電鏡分析低溫時效后等靜壓鈹材的殘余應(yīng)力、晶粒取向差、位錯密度及位錯分布形態(tài)，分析低溫時效處理對鈹材尺寸穩(wěn)定性的影響。結(jié)果表明，低溫時效處理后，熱等靜壓鈹材、退火鈹材和熱冷循環(huán)鈹材在熱循環(huán)過程中的尺寸收縮均明顯減小。低溫時效處理過程中鈹材尺寸穩(wěn)定化機(jī)制主要是晶粒內(nèi)位錯均勻化及微塑性變形導(dǎo)致取向差均勻化。

    Abstract:

    To improve its dimensional stability, the microstructure and residual stress of hot isostatically-pressed beryllium were regulated by low-temperature aging. Results show that after low-temperature aging, the dimensional shrinkages of hot isostatically-pressed beryllium, annealed beryllium, and thermal-cold cycled beryllium are evidently reduced. Various stabilizing mechanisms, including dislocation homogenization and coordinated grain micro-deformation, are observed during low-temperature aging, which effectively improve the dimensional stability of hot isostatically-pressed beryllium.

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任鵬禾,肖來榮,蔡圳陽,涂曉萱,趙小軍.低溫時效對鈹材尺寸穩(wěn)定性的影響[J].稀有金屬材料與工程,2023,52(4):1267~1271.[Ren Penghe, Xiao Lairong, Cai Zhenyang, Tu Xiaoxuan, Zhao Xiaojun. Effects of Low-Temperature Aging on Dimensional Stability of Beryllium[J]. Rare Metal Materials and Engineering,2023,52(4):1267~1271.]
DOI：10.12442/j. issn.1002-185X.20220256

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  • 收稿日期:2022-03-29
  • 最后修改日期:2023-04-04
  • 錄用日期:2022-11-30
  • 在線發(fā)布日期: 2023-04-28
  • 出版日期: 2023-04-25