EFFECT OF DEGASSING AND GRAIN REFINEMENT ON HOT TEARING TENDENCY IN Al8Si3Cu ALLOY

被引:13
|
作者
Uludag, Muhammet [1 ]
Cetin, Remzi [2 ]
Dispinar, Derya [3 ]
Tiryakioglu, Murat [4 ]
机构
[1] Bursa Tech Univ, Met & Mat Engn, Bursa, Turkey
[2] Karatay Univ, Engn Fac, Konya, Turkey
[3] Istanbul Univ, Engn Fac, Istanbul, Turkey
[4] Univ North Florida, Sch Engn, Jacksonville, FL USA
关键词
casting; aluminum alloys; grain refining; simulation; hot tearing; REDUCED PRESSURE TEST; ALUMINUM-ALLOYS; TEMPERATURE; MECHANISMS; BEHAVIOR; CRACKING; TI;
D O I
10.1007/s40962-017-0197-9
中图分类号
TF [冶金工业];
学科分类号
0806 ;
摘要
The effect of melt quality on hot tearing susceptibility of Al8Si3Cu alloy was examined under six different conditions, by using a traditional T-shaped mold. Grain refinement was carried out by two different modifiers: AlTi5B1 and Al3B. For each test, samples were cast before and after degassing of melt. Therefore, a new hot tearing tendency index was developed by both bifilm calculations and porosity that occurred in the middle of T-zone of casting parts. Results indicated that hot tearing of cast aluminum alloys was a complex phenomenon, and bifilms play a major role, especially by compensating for shrinkage and consequently contributing to the inconsistencies in results.
引用
收藏
页码:589 / 595
页数:7
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