基于微观相场动力学理论,建立 B2型金属间化合物的沉淀动力学方程,研究 Fe-Al 合金时效处理时B2-FeAl有序畴界的形成和迁移.结果表明: B2-FeAl金属间化合物有序畴的形核孕育期随时效温度的升高而延长,随Al含量的增加而缩短;有序畴的长程序参数随时效温度的升高而降低,随Al含量的增加而先增大后减小;有序畴界始终向其曲率中心运动,且在曲率较大的地方其运动速率较大;有序畴界的迁移遵循 Rm(t)?Rm(0)=kt (m≈2),m 受合金成分和时效温度的影响很小,但k 的绝对值随着Al含量的降低而减小,随时效温度的升高而增大.
@@@@The precipitation kinetics function of B2 type intermetallic compound was established based on the microscopic phase-field kinetics theory,and it was used to investigate the formation and the motion of B2-FeAl ordered domain boundaries during aging of Fe-Al alloy. The results demonstrate that the nucleation incubation period of B2-FeAl ordered domains becomes longer with the increase of aging temperature,and it becomes shorter with the increase of Al content. The long-range order parameter of ordered domains decreases with the growth of aging temperature,and it first increases then decreases with the increase of Al content. The ordered domain boundaries move to their own centre of curvature all the time, and they move faster at where the curvature of ordered domain boundary is bigger. The rule Rm(t)?Rm(0)=kt (m≈2) is obeyed when the ordered domain boundaries migrate, the value of m is affected very slightly by aging temperature and alloy composition, but the absolute value of k decreases with the decrease of Al content,increases with the increase of aging temperature.
参考文献
| [1] | Haraguchi T;Yoshimi K;Yoo MH;Kato H;Hanada S;Inoue A .Vacancy clustering and relaxation behavior in rapidly solidified B2FeAl ribbons[J].Acta materialia,2005(13):3751-3764. |
| [2] | D. FUKS;A. STRUTZ;A. KIV (Israel) .Influence of alloying on the thermodynamic stability of FeAl B2 phase[J].Intermetallics,2006(10/11):1245-1251. |
| [3] | Ekmekciler E;Polat A;Utsa M .Hard boride coating on iron aluminide (FeAl)[J].Surface & Coatings Technology,2008(24):6011-6015. |
| [4] | Afrooz Barnoush;Jules Dake;Nousha Kheradmand;Horst Vehoff .Examination of hydrogen embrittlement in FeAl by means of in situ electrochemical micropillar compression and nanoindentation techniques[J].Intermetallics,2010(7):1385-1389. |
| [5] | MA Xingwei,JIN Zhuji,YAN Shi,XU Jiujun.Effect of La_2O_3 on microstructure and high-temperature wear property of hot-press sintering FeAl intermetallic compound[J].稀土学报（英文版）,2009(06):1031-1036. |
| [6] | P.Z. Shen;Y.H. He;H.Y. Gao .Development of a new graded-porosity FeAl alloy by elemental reactive synthesis[J].Desalination: The International Journal on the Science and Technology of Desalting and Water Purification,2009(1):29-33. |
| [7] | Haiyan Gao;Yuehui He;Peizhi Shen .Porous FeAl intermetallics fabricated by elemental powder reactive synthesis[J].Intermetallics,2009(12):1041-1046. |
| [8] | H. Lang;K. Rohrhofer;P. Rosenkranz .Long-range ordering in B2 FeAl: a resistometric study[J].Intermetallics,2002(3):283-292. |
| [9] | 邓文,熊良钺,王淑荷,郭建亭,龙期威.Fe-Al系金属间化合物中的微观缺陷和电子密度[J].金属学报,2002(05):453-457. |
| [10] | 孙蔚,吴杰,韩福生.Fe-Al合金中与Al反位置原子弛豫有关的内耗峰[J].金属学报,2007(03):311-314. |
| [11] | STRAHI A;GOLOVINA S B;GOLOVIN I S;NEUHAUSER H .On dislocation-related internal friction in Fe-22-31at.%Al[J].Journal of Alloys and Compounds,2004,378(1/2):268-273. |
| [12] | A. Biborski;L. Zosiak;R. Kozubski;R. Sot;V. Pierron-Bohnes .Semi-grand canonical Monte Carlo simulation of ternary bcc lattice-gas decomposition: Vacancy formation correlated with B2 atomic ordering in A-B intermetallics[J].Intermetallics,2010(12):2343-2352. |
| [13] | KHACHATURYAN A G.Theory of structural transformation in solids[M].New York:Wiley,1983:139-135. |
| [14] | R.PODURI;L.-Q.CHEN .COMPUTER SIMULATION OF THE KINETICS OF ORDER-DISORDER AND PHASE SEPARATION DURING PRECIPITATION OF δ' (Al3Li) IN Al-Li ALLOYS[J].Acta materialia,1997(1):245-255. |
| [15] | R.Poduri;L.-Q.Chen .Computer simulation of morphological evolution and coarsening kinetics of δ'(Al_3Li) precipitates in Al-Li alloys[J].Acta materialia,1998(11):3915-3928. |
| [16] | R.Poduri;L.-Q.Chen .Computer simulation of atomic ordering and compositional clustering in the pseudobinary Ni_3Al-Ni_3V system[J].Acta materialia,1998(5):1719-1729. |
| [17] | CHEN L Q .Fhase-field models for microstructure evolution[J].ANNUAL REVIEW OF MATERIALS RESEARCH,2002,32:113-140. |
| [18] | 张明义,王永欣,陈铮,张静,赵彦,甄辉辉.Ni-Al-V合金L12相间有序畴界面的微观相场模拟[J].金属学报,2007(10):1101-1106. |
| [19] | 张明义,王永欣,陈铮,董卫平,来庆波,张利鹏.Ni-Al-V合金DO22相间有序畴界面的微观相场模拟[J].稀有金属材料与工程,2009(06):962-966. |
| [20] | 张静,陈铮,王永欣,卢艳丽,霍进良,甄辉辉,赵彦.微观相场法模拟Ni75Al5.3V19.7中L12和D022结构反位缺陷的演化[J].物理学报,2009(01):631-637. |
| [21] | 苗树芳,陈铮,王永欣,徐聪,马锐,张明义.L10相和L12相结构原位转变的微观相场法模拟[J].金属学报,2009(05):630-634. |
| [22] | P.R. Alonso;P.H. Gargano;P.B. Bozzano .Combined ab initio and experimental study of A2 + L2_1 coherent equilibria in the Fe-Al-X (X = Ti, Nb, V) systems[J].Intermetallics,2011(8):1157-1167. |
| [23] | KRZANOWSKI J E;ALLEN S M .Segregation to static and migrating diffuse antiphase boundaries[J].Surface Science,1984,144(01):153-175. |
| [24] | ALLEN S M;CAHN J W .A microscopic theory for antiphase boundary motion and its application to antiphase domain coarsening[J].ACTA METALLURGICA,1979,27(06):1085-1095. |
| [25] | Chen LQ. .Kinetics of ordering and spinodal decomposition in the pair approximation[J].Physical Review.B.Condensed Matter,1998(9):5266-5274. |
| [26] | Vlad Liubich;Simon Dorfman;David Fuks;Helmut Mehrer .Thermodynamic factor evaluated from diffuse X-ray scattering[J].Materials transactions,1999(2):132-136. |
| [27] | Pfeiler W.;Sprusil B. .Atomic ordering in alloys: stable states and kinetics[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2002(1-2 Special Issue SI):34-42. |
| [28] | Q. WANG;L.-Q. CHEN .SOLUTE SEGREGATION AND ANTIPHASE BOUNDARY MOTION IN A B2 SINGLE PHASE[J].Acta materialia,1999(13):3695-3703. |
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