应用Gleeble3800热模拟试验机对GH984G18合金进行热压缩实验,以实验获得的应力-应变曲线为基础,根据动态材料模型建立该合金不同应变时的热加工图,利用热加工图确定了热加工工艺窗口,并分析了温度和变形量对实验合金动态再结晶的影响.结果表明:应变较小(ε≤0.2)时,可优先选择的变形温度为1030～1090℃,应变速率为0.01～0.18s-1;随应变增加(ε≥0.3),最佳热变形温度范围移至高温区间1180～1200℃,最佳应变速率范围大致为0.056～0.25s-1;当应变速率为1s-1时,温度小于900℃不能引起动态再结晶,仅使得晶粒发生动态回复;当变形温度和应变量分别达到1000℃和30％时,发生部分动态再结晶;当变形温度为1000℃,应变量为60％时,发生完全动态再结晶.
参考文献
| [1] | N.D. Evans;P.J. Maziasz;R.W. Swindeman.Microstructure and phase stability In INCONEL alloy 740 during creep[J].Scripta materialia,20046(6):503-507. |
| [2] | Joachim Rosler;Martin Gotting;Dominique Del Genovese;Bernd Bottger;Reiner Kopp;Markus Wolske;Florian Schubert;Heinz-Josef Penkalla;Tomas Seliga;Andreas Thoma;Alfred Scholz;Christina Berger.Wrought Ni-base superalloys for steam turbine applications beyond 700℃[J].Advanced Engineering Materials,20037(7):469-483. |
| [3] | Vis Viswanathan;Robert Purgert;Patricia Rawls.COAL-FIRED POWER MATERIALS[J].Advanced Materials & Processes,20088(8):47-49. |
| [4] | Tokairin, T.;Dahl, K.V.;Danielsen, H.K.;Grumsen, F.B.;Sato, T.;Hald, J..Investigation on long-term creep rupture properties and microstructure stability of Fe-Ni based alloy Ni-23Cr-7W at 700°C[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2013:285-291. |
| [5] | 郭建亭;杜秀魁.一种性能优异的过热器管材用高温合金GH2984[J].金属学报,2005(11):1221-1227. |
| [6] | R. KRISHNA;S.V. HAINSWORTH;S.P.A. GILL.Topologically Close-Packed μ Phase Precipitation in Creep-Exposed Inconel 617 Alloy[J].Metallurgical and Materials Transactions, A. Physical Metallurgy and Materials Science,20133(3):1419-1429. |
| [7] | Shingledecker, J.P.;Evans, N.D.;Pharr, G.M..Influences of composition and grain size on creep-rupture behavior of Inconel~? alloy 740[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2013:277-286. |
| [8] | J. P. Shingledecker;G. M. Pharr.Testing and Analysis of Full-Scale Creep-Rupture Experiments on Inconel Alloy 740 Cold-Formed Tubing[J].Journal of Materials Engineering and Performance,20132(2):454-462. |
| [9] | 谭梅林;王常帅;郭永安;郭建亭;周兰章.Ti/Al比对GH984G合金长期时效过程中γ'沉淀相粗化行为及拉伸性能的影响[J].金属学报,2014(10):1260-1268. |
| [10] | 李润霞;张磊;刘兰吉;张立军;白彦华;李荣德.Al-17.5Si-4Cu-0.5Mg合金热变形行为及其加工图[J].航空材料学报,2015(1):25-32. |
| [11] | 俞秋景;张伟红;于连旭;刘芳;孙文儒;胡壮麒.铸态Inconel 625合金热加工图的建立及热变形机制分析[J].材料工程,2014(1):30-34. |
| [12] | 曾卫东;周义刚;周军;俞汉清;张学敏;徐斌.加工图理论研究进展[J].稀有金属材料与工程,2006(5):673-677. |
| [13] | Balasubrahmanyam VV.;Prasad YVRK..Deformation behaviour of beta titanium alloy Ti-10V-4.5Fe-1.5Al in hot upset forging[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,20021/2(1/2):150-158. |
| [14] | Sun, M.;Hao, L.;Li, S.;Li, D.;Li, Y..Modeling flow stress constitutive behavior of SA508-3 steel for nuclear reactor pressure vessels[J].Journal of Nuclear Materials: Materials Aspects of Fission and Fusion,20111/3(1/3):269-280. |
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