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預(yù)變形對(duì)2099合金組織性能的影響
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寶山鋼鐵股份有限公司研究院,北京有色金屬研究總院,寶山鋼鐵股份有限公司研究院

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TG156.93

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Effect of Pre-stretch on Microstructure and Property of 2099 Alloy
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Research Institute of BaoSteel,,

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    通過(guò)顯微硬度測(cè)試、力學(xué)性能測(cè)試和透射電鏡觀察等手段，研究了不同預(yù)變形程度對(duì)2099合金顯微組織和力學(xué)性能的影響。結(jié)果表明，隨著預(yù)變形程度增大，合金時(shí)效進(jìn)程顯著加快，合金峰時(shí)效態(tài)的強(qiáng)度顯著提高；析出相更為細(xì)小彌散地分布于基體中，較為粗大的晶界析出相趨于不連續(xù)化、點(diǎn)鏈化；時(shí)效強(qiáng)化相經(jīng)歷了由T1相、δ′相和θ′相三相共存到以T1相為主要強(qiáng)化相的變化過(guò)程，表明預(yù)變形對(duì)時(shí)效過(guò)程中析出相的大小、類型、分布有重要影響，在促進(jìn)T1相析出的同時(shí)，也消耗了δ′相和θ′相。

    Abstract:

    Microstructure and mechanical property of 2099 alloy under different pre-stretch degree have been studied by micro-hardening test, mechanical test and TEM observation. The results show that with the increase of pre-stretch the aging process is accelerated greatly and the mechanical properties are improved obviously. Precipitation phases become more fine and dispersed in matrix, some coarse phases in grain boundaries tend to discontinuous and point chain. The main aging strengthen phases of 2099 alloy experience a transformation from T1, δ′ and θ′ three phases coexistence to T1 phase, which indicated that pre-stretch have important effect on the size, type and distribution of precipitation, which can promote T1 phase precipitation in the expense of δ′ and θ′ phases consumption during the aging process.

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張飛,沈健,刁可山.預(yù)變形對(duì)2099合金組織性能的影響[J].稀有金屬材料與工程,2017,46(11):3321~3325.[zhangfei, shenjian, diaokeshan. Effect of Pre-stretch on Microstructure and Property of 2099 Alloy[J]. Rare Metal Materials and Engineering,2017,46(11):3321~3325.]
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歷史
  • 收稿日期:2015-09-09
  • 最后修改日期:2015-12-18
  • 錄用日期:2016-01-14
  • 在線發(fā)布日期: 2017-12-13
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