A modified hot tearing criterion for direct chill casting of aluminium alloys

被引：18
|
作者：
Bai, Q. L. [1 ]
Liu, J. C. [1 ]
Li, H. X. [1 ]
Du, Q. [2 ]
Katgerman, L. [3 ]
Zhang, J. S. [1 ]
Zhuang, L. Z. [1 ]
机构：
[1] Univ Sci & Technol Beijing, State Key Lab Adv Met & Mat, Beijing 100083, Peoples R China
[2] SINTEF Mat & Chem, Trondheim, Norway
[3] Delft Univ Technol, Dept Mat Sci & Engn, Mekelweg 2, NL-2628 CD Delft, Netherlands
来源：
MATERIALS SCIENCE AND TECHNOLOGY | 2016年 / 32卷 / 08期
关键词：
Direct chill casting; Hot tearing susceptibility; Fracture mechanics; A modified hot tearing criterion; MECHANICAL-PROPERTIES; SEMISOLID STATE; BEHAVIOR; SOLIDIFICATION; MODEL;
D O I：
10.1080/02670836.2015.1104081
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Using the good criteria to predict hot tearing is very important during DC casting of aluminium alloys. Among all the hot tearing criteria, a fracture-mechanics based SKK criterion proposed by Suyitno et al. has made considerable improvements in the hot tearing prediction. However, its obtained hot tearing susceptibility (HTS) evolution during solidification is also not completely consistent with real industrial production circumstances, especially when approaching the solidus temperature. In this paper, some further modifications are made based on the SKK criterion to emphasise the important effect of solid bridging/grain coalescence on hot tear propagation. It is proved that the HTS evolution in freezing range predicted by the modified hot tearing criterion is in good agreement with casting practice.
引用
收藏
页码：846 / 854
页数：9
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