Effect of Zn addition on hot tearing behaviour of Mg-0.5Ca-xZn alloys
Research output: Journal contributions › Journal articles › Research › peer-review
Standard
Effect of Zn addition on hot tearing behaviour of Mg-0.5Ca-xZn alloys. / Song, Jiangfeng; Wang, Zhi; Huang, Yuanding et al.
In: Materials and Design, Vol. 87, 15.12.2015, p. 157-170.Research output: Journal contributions › Journal articles › Research › peer-review
Harvard
APA
Vancouver
Bibtex
}
RIS
TY - JOUR
T1 - Effect of Zn addition on hot tearing behaviour of Mg-0.5Ca-xZn alloys
AU - Song, Jiangfeng
AU - Wang, Zhi
AU - Huang, Yuanding
AU - Srinivasan, Amirthalingam
AU - Beckmann, Felix
AU - Kainer, Karl Ulrich
AU - Hort, Norbert
PY - 2015/12/15
Y1 - 2015/12/15
N2 - The influence of Zn addition (0, 0.5, 1.5, 4.0 and 6.0wt.%) on hot tearing behaviour of Mg-0.5wt.% Ca alloy was investigated using a constrained rod casting (CRC) apparatus. The effects of mould temperature and grain refinement on the hot tearing susceptibility (HTS) were studied. Hot tears were observed with 3D X-ray tomography and the tear volumes were quantified. Results show that the Zn addition increases the HTS of Mg-0.5Ca alloys. At a mould temperature of 250°C, all alloys investigated except Mg-0.5Ca-6Zn alloy show severe HTS. An increase in the mould temperature from 250°C to 450°C did not reduce the HTS in Mg-0.5Ca-1.5Zn and Mg-0.5Ca-4Zn alloys. Among all the investigated alloys, Mg-0.5Ca-4Zn alloy exhibits severe HTS as it completely broke away from the sprue-rod junction. The HTS of alloys was well correlated with the susceptible temperature range (δTs). An increase in δTs increased the HTS. The hot tears propagated along the grain boundaries through liquid film rupture. Grain refinement by Zr addition improved the hot tearing resistance of Mg-0.5Ca-4Zn alloy as the fine grain structure facilitated the easy feeding of liquid into the last area of solidification and accommodated the developed strain more effectively.
AB - The influence of Zn addition (0, 0.5, 1.5, 4.0 and 6.0wt.%) on hot tearing behaviour of Mg-0.5wt.% Ca alloy was investigated using a constrained rod casting (CRC) apparatus. The effects of mould temperature and grain refinement on the hot tearing susceptibility (HTS) were studied. Hot tears were observed with 3D X-ray tomography and the tear volumes were quantified. Results show that the Zn addition increases the HTS of Mg-0.5Ca alloys. At a mould temperature of 250°C, all alloys investigated except Mg-0.5Ca-6Zn alloy show severe HTS. An increase in the mould temperature from 250°C to 450°C did not reduce the HTS in Mg-0.5Ca-1.5Zn and Mg-0.5Ca-4Zn alloys. Among all the investigated alloys, Mg-0.5Ca-4Zn alloy exhibits severe HTS as it completely broke away from the sprue-rod junction. The HTS of alloys was well correlated with the susceptible temperature range (δTs). An increase in δTs increased the HTS. The hot tears propagated along the grain boundaries through liquid film rupture. Grain refinement by Zr addition improved the hot tearing resistance of Mg-0.5Ca-4Zn alloy as the fine grain structure facilitated the easy feeding of liquid into the last area of solidification and accommodated the developed strain more effectively.
KW - 3D X-ray tomography
KW - Grain refinement
KW - Hot tearing
KW - Mg-0.5Ca-xZn alloys
KW - Mould temperature
KW - Engineering
UR - http://www.scopus.com/inward/record.url?scp=84944200186&partnerID=8YFLogxK
U2 - 10.1016/j.matdes.2015.08.026
DO - 10.1016/j.matdes.2015.08.026
M3 - Journal articles
AN - SCOPUS:84944200186
VL - 87
SP - 157
EP - 170
JO - Materials and Design
JF - Materials and Design
SN - 0264-1275
ER -