Abstract
Residual stresses in Mg-xCa (0.5 wt. % and 1.0 wt. %) cast alloys were investigated by neutron diffraction using a mould with two preheating temperatures of 250 °C and 450 °C. Results show that the increase of Ca content decreases the residual stress in the hot sprue region. These results are quite in agreement with those obtained by the measurement of hot tearing susceptibility, which shows the increment in Ca content improves the castability of Mg-Ca alloys.
Highlights
Hot tearing or hot cracking is often a major casting defect and have significant impact on the quality of casting products
Previous investigations on hot tearing of Mg-Al and Mg-Zn alloys have shown that casting defects such as hot cracks could occur at the hot spot due to accumulation of thermal stresses during solidification
The present investigation quantifies the distribution of residual stress in castings of Mg-Ca alloys using neutron diffraction from the point of view of their castability
Summary
Hot tearing or hot cracking is often a major casting defect and have significant impact on the quality of casting products. Thermal stress involves different consequences such as distortion, crack, hot tear, and residual stress [1]. Previous investigations on hot tearing of Mg-Al and Mg-Zn alloys have shown that casting defects such as hot cracks could occur at the hot spot due to accumulation of thermal stresses during solidification. The present investigation quantifies the distribution of residual stress in castings of Mg-Ca alloys using neutron diffraction from the point of view of their castability.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
