3 = kt,可獲得如下 。γ析出相平均粒徑隨時效時間的變化分為兩個階段,階段I增長快速而階段II增長速度減緩。時效溫度由700oC增至750oC,γ相粒徑分布的峰值變大以及粒徑分布的寬度變窄,模擬結(jié)果與實驗結(jié)果取得良好的一致性。"/>

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Co-Ti合金中γ相粗化動力學(xué)的實驗研究和相場模擬
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作者單位:

1.材料學(xué)院及福建省材料基因工程重點實驗室;2.哈爾濱工業(yè)大學(xué)深圳研究院材料科學(xué)與工程系

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國家重點研發(fā)計劃，科技部國際科技合作專項


Experimental Research and Phase-field Simulation of Coarsening Kinetics of γ Precipitates in Co-Ti Alloys
Author:
Affiliation:

1.College of Materials and Fujian Provincial Key Laboratory of Materials Genome;2.Department of Materials Science and Engineering, Harbin Institute of Technology, Shenzhen

Fund Project:

The National Natural Science Foundation of China (General Program, Key Program, Major Research Plan)

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    摘要:

    本研究結(jié)合實驗和相場法研究了反相Co-19.7Ti合金中無序γ析出相的組織演變和粗化行為。實驗和模擬結(jié)果皆表明γ析出相的形貌隨時效時間增加由近球形轉(zhuǎn)變成條狀。γ析出相平均粒徑的粗化動力學(xué)遵循r3 = kt,可獲得如下 。γ析出相平均粒徑隨時效時間的變化分為兩個階段,階段I增長快速而階段II增長速度減緩。時效溫度由700oC增至750oC,γ相粒徑分布的峰值變大以及粒徑分布的寬度變窄,模擬結(jié)果與實驗結(jié)果取得良好的一致性。

    Abstract:

    The microstructure evolution and coarsening behaviors of disordered γ phase in the inverse Co-19.7Ti alloy have been investigated by experiment and phase-field method. Both the experimental and simulated results show that the morphologies of γ particles evolved from near-circular shape to plate-like shape as the aging time increases. The coarsening kinetics for the mean particle size obeys the cube law r3 = kt, and it can be obtained as: . There exist two distinct stages of the mean particle sizes increase versus aging time, the growth rate is dramatically larger in stage I and has a relatively slower increase in stage II. The summit value of precipitate size distributions become larger and the breadth of the distributions decrease from 700oC to 750oC, the simulated results reproduce well the experimental results.

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王翠萍,黃劍洪,盧勇,劉興軍. Co-Ti合金中γ相粗化動力學(xué)的實驗研究和相場模擬[J].稀有金屬材料與工程,2019,48(9):2799~2807.[wangcuiping, huangjianhong, luyong, liuxingjun. Experimental Research and Phase-field Simulation of Coarsening Kinetics of γ Precipitates in Co-Ti Alloys[J]. Rare Metal Materials and Engineering,2019,48(9):2799~2807.]
DOI：10.12442/j. issn.1002-185X.20180229

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  • 收稿日期:2018-03-14
  • 最后修改日期:2018-05-04
  • 錄用日期:2018-05-18
  • 在線發(fā)布日期: 2019-10-09
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