In Situ Observation of the Zr Poisoning Effect in Al Alloys Inoculated by Al-Ti-B

作者: Yiwang Jia , Shubin Wang , Haijun Huang , Donghong Wang , Yanan Fu

DOI: 10.1007/S11661-018-4834-6

关键词:

摘要: In situ synchrotron X-ray radiography observations of the Zr-poisoning phenomenon an Al-20 wt pct Zn alloy inoculated by Al-5Ti-1B were carried out. The effects Zr addition on heterogeneous nucleation, grain growth, and final size quantitatively studied further analyzed using interdependence model. experimental results show that undercooling needed for nucleation increases rate decreases at early stage solidification with addition, resulting in fast a high increased severity solute segregation solid–liquid coexistence regions. At same time, poisoning is progressive process enhanced increasing content, holding temperature, time. nucleation-free zone Zr-containing sample, either measured from radiographs or calculated interdependency theory, larger than Zr-free sample. Our analysis shows both increase average interparticle spacing most potent available particles contribute to caused poisoning.

参考文章(41)
Haijun Huang, Da Shu, Jianrong Zeng, Fenggang Bian, Yanan Fu, Jun Wang, Baode Sun, In situ small angle X-ray scattering investigation of ultrasound induced nucleation in a metallic alloy melt Scripta Materialia. ,vol. 106, pp. 21- 25 ,(2015) , 10.1016/J.SCRIPTAMAT.2015.04.011
A.G. Murphy, W.U. Mirihanage, D.J. Browne, R.H. Mathiesen, Equiaxed dendritic solidification and grain refiner potency characterised through in situ X-radiography Acta Materialia. ,vol. 95, pp. 83- 89 ,(2015) , 10.1016/J.ACTAMAT.2015.04.060
Tomasz Stuczyński, Marzena Lech-Grega, Grain Refinement Process in Aluminium Alloys Type AlZnMgZr John Wiley & Sons, Ltd. pp. 224- 232 ,(2006) , 10.1002/3527607331.CH33
Arvind Prasad, Stuart D. McDonald, Hideyuki Yasuda, Kazuhiro Nogita, David H. StJohn, A real-time synchrotron X-ray study of primary phase nucleation and formation in hypoeutectic Al–Si alloys Journal of Crystal Growth. ,vol. 430, pp. 122- 137 ,(2015) , 10.1016/J.JCRYSGRO.2015.06.024
Faguo Li, Jiao Zhang, Qing Dong, Yongbing Dai, Yanan Fu, Honglan Xie, J. Mi, Fucheng Yin, Baode Sun, In situ synchrotron X-ray studies of the coupled effects of thermal and solutal supercoolings on the instability of dendrite growth Materials Characterization. ,vol. 109, pp. 9- 18 ,(2015) , 10.1016/J.MATCHAR.2015.09.008
M.A. Easton, M. Qian, A. Prasad, D.H. StJohn, Recent advances in grain refinement of light metals and alloys Current Opinion in Solid State & Materials Science. ,vol. 20, pp. 13- 24 ,(2016) , 10.1016/J.COSSMS.2015.10.001
S. Ganesan, D. R. Poirier, Densities of aluminum-rich Metallurgical and Materials Transactions A. ,vol. 18, pp. 721- 723 ,(1987) , 10.1007/BF02649490
Haijun Huang, Da Shu, Yanan Fu, Jun Wang, Baode Sun, Synchrotron radiation X-ray imaging of cavitation bubbles in Al-Cu alloy melt. Ultrasonics Sonochemistry. ,vol. 21, pp. 1275- 1278 ,(2014) , 10.1016/J.ULTSONCH.2013.12.024
D. Qiu, J.A. Taylor, M.-X. Zhang, Understanding the Co-Poisoning Effect of Zr and Ti on the Grain Refinement of Cast Aluminum Alloys Metallurgical and Materials Transactions A-physical Metallurgy and Materials Science. ,vol. 41, pp. 3412- 3421 ,(2010) , 10.1007/S11661-010-0404-2