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基于CA法的高溫合金IN690管材擠壓變形動態(tài)再結(jié)晶組織演變規(guī)律研究
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沈陽理工大學(xué)材料科學(xué)與工程學(xué)院,沈陽理工大學(xué)材料科學(xué)與工程學(xué)院

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TG376.9

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國家自然科學(xué)基金資助(項(xiàng)目號50834008)


Study on Micro-structure evolution of Dynamic recrystallization during tube extrusion of IN690 super alloy based on Cellular Automata
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1.School of Material Science Engineering,Shenyang Ligong University,1.School of Material Science Engineering,Shenyang Ligong University

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    摘要:

    采用元胞自動機(jī)(CA)方法對高溫合金IN690管材擠壓變形過程中動態(tài)再結(jié)晶組織演變規(guī)律進(jìn)行了數(shù)值模擬研究。確定了位錯密度模型、回復(fù)模型、形核模型、晶粒長大模型等。分析了擠壓變形過程中動態(tài)再結(jié)晶的過程,得到了變形過程中的晶粒形態(tài)、分布、取向和尺寸。研究結(jié)果表明,在相同擠壓比條件下,管壁外部的平均晶粒尺寸小于管壁中部；在管材的相同部位,隨著擠壓比的增大,平均晶粒尺寸減小。平均晶粒尺寸的數(shù)值模擬結(jié)果與實(shí)驗(yàn)結(jié)果的相對誤差小于16.6％。

    Abstract:

    Dynamic recrystallization of IN690 super alloy during tube extrusion had been simulated based on Cellular Automata(CA). It had been determined that model of dislocation density and model of reply and model of nucleation and model of grain growth. It had been obtained that grain morphology and distribution and orientation and size during the process of deformation. The results presented that the grain size of the external wall was smaller than that of the middle under the same extrusion ratio. With the increasing of extrusion ratio, the grain size at the same site of the tube decreased. The relative errors of the grain sizes of simulation and experiment were less than 16.6%.

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王忠堂,戶金科.基于CA法的高溫合金IN690管材擠壓變形動態(tài)再結(jié)晶組織演變規(guī)律研究[J].稀有金屬材料與工程,2017,46(9):2512~2516.[WANG Zhong-tang, HU Jin-ke. Study on Micro-structure evolution of Dynamic recrystallization during tube extrusion of IN690 super alloy based on Cellular Automata[J]. Rare Metal Materials and Engineering,2017,46(9):2512~2516.]
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  • 收稿日期:2015-05-14
  • 最后修改日期:2015-11-19
  • 錄用日期:2015-12-11
  • 在線發(fā)布日期: 2017-11-29
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