Effect of ultrasonic treatment and Sr addition on microstructure of Al-20%Si alloy
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- 论文类型：期刊论文
- 发表时间：2013-07-01
- 发表刊物：CHINA FOUNDRY
- 收录刊物：SCIE、Scopus
- 卷号：10
- 期号：4
- 页面范围：213-216
- ISSN号：1672-6421
- 关键字：ultrasonic treatment; nucleation rate; liquidus; strontium modification;
quenching
- 摘要：Many investigations have revealed that transition of melt structure can effectively influence the final solidification microstructures. In this study, ultrasonic treatment was applied to Al-20%Si melt and Sr-modified Al-20%Si melt at 720 degrees C (i.e. above liquidus of about 690 degrees C) for 60 s, and then the melt was quickly quenched to room temperature. Experimental results show that ultrasonic treatment can refine the primary Si phase and alpha-Al of Al-20%Si alloy; strontium can make the morphology of Si phase spheroidized and refined as Sr addition changes the faceted growth characteristic of Si phase; however, the refinement effect of ultrasonic treatment on the primary Si phase and alpha-Al is weakened by Sr addition.
- 发表时间：2013-07-01
