本文關(guān)鍵詞： ZrTAlVi合金 熱壓縮實(shí)驗(yàn) 本構(gòu)模型 微觀組織演變模型 Deform-3D　出處：《燕山大學(xué)》2016年碩士論文　論文類型：學(xué)位論文

【摘要】：ZrTiAlV合金是一種同時(shí)具有鈦合金和鋯合金優(yōu)點(diǎn)的新型合金,因此ZrTiAlV合金可以作為航天結(jié)構(gòu)材料和核工業(yè)材料的構(gòu)件使用,其鍛件的主要成形方法為熱鍛,而鍛造工藝參數(shù)在很大程度上會(huì)對(duì)ZrTiAlV合金件的性能及組織產(chǎn)生影響。所以,通過(guò)實(shí)驗(yàn)手段建立ZrTiAlV合金的本構(gòu)方程及微觀組織演變模型,并結(jié)合Deform-3D有限元分析軟件對(duì)ZrTiAlV合金鍛件熱成形過(guò)程進(jìn)行模擬,預(yù)測(cè)其微觀組織分布,從而更好的指導(dǎo)實(shí)際生產(chǎn)。本文利用Gleeble-3800熱模擬實(shí)驗(yàn)機(jī)對(duì)ZrTiAlV合金進(jìn)行熱壓縮實(shí)驗(yàn),得到了其在不同變形條件下的應(yīng)力應(yīng)變曲線,并對(duì)各變形條件對(duì)其應(yīng)力的影響規(guī)律進(jìn)行分析。再通過(guò)對(duì)實(shí)驗(yàn)數(shù)據(jù)的擬合,建立ZrTiAlV合金熱變形性能參數(shù)與Z參數(shù)的函數(shù)關(guān)系,并以Arrhenius雙曲正弦方程為基礎(chǔ),建立了適用于ZrTiAlV合金熱變形過(guò)程的本構(gòu)模型。通過(guò)對(duì)壓縮完成后的樣品進(jìn)行金相制備及數(shù)據(jù)統(tǒng)計(jì)分析,得到了各變形參數(shù)對(duì)ZrTiAlV合金熱變形過(guò)程中的平均晶粒度、再結(jié)晶晶粒度、再結(jié)晶體積分?jǐn)?shù)等的影響規(guī)律,基于統(tǒng)計(jì)數(shù)據(jù)建立了ZrTiAlV合金熱鍛過(guò)程中的動(dòng)態(tài)再結(jié)晶模型、亞動(dòng)態(tài)再結(jié)晶模型及靜態(tài)再結(jié)晶模型。將建立的熱變形本構(gòu)模型及微觀組織演變模型導(dǎo)入Deform-3D軟件對(duì)渦輪盤(pán)鍛件的成形過(guò)程進(jìn)行模擬。根據(jù)模擬結(jié)果,分析了鍛件的成形情況及應(yīng)力應(yīng)變等的變化規(guī)律,并對(duì)其平均晶粒度、再結(jié)晶晶粒度、再結(jié)晶體積分?jǐn)?shù)等微觀組織演變參量進(jìn)行了預(yù)測(cè)。
[Abstract]:ZrTiAlV alloy is a new kind of alloy which has the advantages of both titanium alloy and zirconium alloy. Therefore, ZrTiAlV alloy can be used as a component of spaceflight structure materials and nuclear industrial materials. The main forming method of its forgings is hot forging. The forging process parameters have a great influence on the properties and microstructure of ZrTiAlV alloy. Therefore, the constitutive equation and microstructure evolution model of ZrTiAlV alloy are established by means of experiments. The hot forming process of ZrTiAlV alloy forgings is simulated with Deform-3D finite element analysis software, and the microstructure distribution is predicted, which can better guide the actual production. In this paper, the thermal compression experiment of ZrTiAlV alloy is carried out by using Gleeble-3800 thermal simulation machine. The stress-strain curves of ZrTiAlV alloy under different deformation conditions are obtained, and the influence of each deformation condition on its stress is analyzed. By fitting the experimental data, the functional relationship between the thermal deformation performance parameters and Z parameters of ZrTiAlV alloy is established. Based on the Arrhenius hyperbolic sinusoidal equation, a constitutive model suitable for hot deformation of ZrTiAlV alloy was established. The effects of deformation parameters on the average grain size, recrystallization grain size and the integral number of recrystallized volume of ZrTiAlV alloy during hot deformation were obtained. Based on the statistical data, the dynamic recrystallization model of ZrTiAlV alloy during hot forging was established. Subdynamic recrystallization model and static recrystallization model. The thermal deformation constitutive model and microstructure evolution model were imported into Deform-3D software to simulate the forming process of turbine disk forgings. The forming conditions of forgings and the variation of stress and strain were analyzed, and the microstructure evolution parameters such as average grain size, recrystallization grain size and integral number of recrystallized volume were predicted.
【學(xué)位授予單位】：燕山大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2016
【分類號(hào)】：TG319

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1 胡東東;熱處理對(duì)ZrTiAlV合金摩擦磨損行為的影響[D];哈爾濱工業(yè)大學(xué);2015年

2 彭超楠;ZrTiAlV合金鍛造過(guò)程中變形與組織演化規(guī)律[D];燕山大學(xué);2016年

3 王浦;ZrTiAlV合金的疲勞性能研究[D];燕山大學(xué);2012年

4 田超;熱軋溫度和時(shí)效處理對(duì)ZrTiAlV合金組織與性能的影響[D];燕山大學(xué);2013年

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本文編號(hào)：1538655