Metallurgical and Materials Transactions A

, Volume 49, Issue 10, pp 4429–4434 | Cite as

In Situ Observation on Bubble Behavior of Solidifying Al-Ni Alloy Under the Interference of Intermetallic Compounds

  • Siyu Sun
  • Qiaodan HuEmail author
  • Wenquan Lu
  • Zongye Ding
  • Mingxu Xia
  • Jianguo Li


The growth behavior of hydrogen bubbles and their interaction with intermetallic compounds during solidifying Al-Ni alloy were investigated by synchrotron radiation. The bubble growth can be divided as three stages, i.e., free growth, accelerated growth, and shrinkage. The free growth agrees well with stochastic model. The accelerated growth is attributed to the increase of hydrogen concentration and its gradient at the bubble–liquid interface caused by their contact. The negative hydrogen concentration gradient ahead of the bubble–liquid interface resulted in the bubble shrinkage. Also, the increasing gas pressure and decreasing Ni content promoted hydrogen dissolution.


This work is supported by the National Key Research and Development Program of China (2017YFA0403800), National Natural Science Foundation of China (51374144 and 51727802), Shanghai Municipal Natural Science Foundation (13ZR1420600), and Shanghai Rising-Star Program (14QA1402300). The support of the BL13W1 beam line of Shanghai Synchrotron Radiation Facility (SSRF) is gratefully acknowledged.

Supplementary material

11661_2018_4818_MOESM1_ESM.avi (224.5 mb)
Supplementary material 1 (AVI 229867 kb)


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Copyright information

© The Minerals, Metals & Materials Society and ASM International 2018

Authors and Affiliations

  • Siyu Sun
    • 1
  • Qiaodan Hu
    • 1
    Email author
  • Wenquan Lu
    • 1
  • Zongye Ding
    • 1
  • Mingxu Xia
    • 1
  • Jianguo Li
    • 1
  1. 1.Shanghai Key Laboratory of Materials Laser Processing and Modification, School of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghaiP.R. China

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