Effect of the melt superheat on equiaxed solidification of al-20 wt% cu alloy investigated by in situ synchrotron radiography
文献类型：期刊论文
| 作者 | Luo, Shifeng1; Yang, Guangyu1; Xiao, Lei1; Huang, Wanxia2; Yuan, Qingxi2; Jie, Wanqi1 |
| 刊名 | Journal of crystal growth
 |
| 出版日期 | 2017-10-15 |
| 卷号 | 476页码:38-44 |
| 关键词 | A1.melt superheat A1.mean grain size A1.mean growth rate A1.mean nucleation rate A1.synchrotron x-ray radiography A1.nucleation undercooling |
| ISSN号 | 0022-0248 |
| DOI | 10.1016/j.jcrysgro.2017.07.001 |
| 通讯作者 | Yang, guangyu(ygy@nwpu.edu.cn) |
| 英文摘要 | Effect of the melt superheat on equiaxed solidification of al-20 wt% cu alloy was investigated by in-situ synchrotron radiography at beijing synchrotron radiation facility. for comparison, the corresponding dsc analysis was also conducted. it was found that the grain size decreased with increasing the melt superheat. the relationship between the final mean grain size and the melt superheat can be expressed as: d = 4919: 3 x delta t-0:33. during solidification, the mean grain size increased sharply in the first 70s, then reached the final grain size gradually. furthermore, with increasing the melt superheat, the mean nucleation rate increased, which can be attributed to the fact that increasing the melt superheat led to an increase in nucleation undercooling, and the growth rate and the duration of free growth stage decreased. as the melt superheat increased from 100 degrees c to 160 degrees c, the mean nucleation rate increased by 78.2% while the mean growth rate only decreased by 19.3%, which indicated that the high mean nucleation rate and the consequent low mean growth rate may be the real reasons for grain refinement. the increased nucleation density caused earlier growth deceleration due to solutal impingement effects. (c) 2017 elsevier b.v. all rights reserved. |
| WOS关键词 | X-RAY RADIOGRAPHY ; REAL-TIME OBSERVATION ; DIRECTIONAL SOLIDIFICATION ; GRAIN-REFINEMENT ; PHASE-CHANGE ; PART I ; AL ; MICROSTRUCTURE ; GROWTH ; KINETICS |
| WOS研究方向 | Crystallography ; Materials Science ; Physics |
| WOS类目 | Crystallography ; Materials Science, Multidisciplinary ; Physics, Applied |
| 语种 | 英语 |
| WOS记录号 | WOS:000410917600007 |
| 出版者 | ELSEVIER SCIENCE BV |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2177041 |
| 专题 | 高能物理研究所 |
| 通讯作者 | Yang, Guangyu |
| 作者单位 | 1.Northwestern Polytech Univ, State Key Lab Solidificat Proc, 127 Youyi Western Rd, Xian 710072, Shaanxi, Peoples R China 2.Chinese Acad Sci, Inst High Energy Phys, Beijing 100039, Peoples R China |
| 推荐引用方式 GB/T 7714 | Luo, Shifeng,Yang, Guangyu,Xiao, Lei,et al. Effect of the melt superheat on equiaxed solidification of al-20 wt% cu alloy investigated by in situ synchrotron radiography[J]. Journal of crystal growth,2017,476:38-44. |
| APA | Luo, Shifeng,Yang, Guangyu,Xiao, Lei,Huang, Wanxia,Yuan, Qingxi,&Jie, Wanqi.(2017).Effect of the melt superheat on equiaxed solidification of al-20 wt% cu alloy investigated by in situ synchrotron radiography.Journal of crystal growth,476,38-44. |
| MLA | Luo, Shifeng,et al."Effect of the melt superheat on equiaxed solidification of al-20 wt% cu alloy investigated by in situ synchrotron radiography".Journal of crystal growth 476(2017):38-44. |
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