Prediction of Microporosity in Complex Thin-Wall Castings with the Dimensionless Niyama Criterion

Materials

Maodong Kang²  Haiyan Gao¹  Jun Wang¹  Lishibao Ling² 

[1] The State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, China;

关键词: nickel-based superalloy;    complex thin-wall casting;    microporosity;    prediction;   

DOI  :  10.3390/ma6051789

来源: mdpi

【 摘 要 】

The dimensionless Niyama criterion was used to predict the formation of microporosity in nickel-based superalloy casting, which extended the model application from a simple plate casting to complex thin-wall superalloy casting. The physical characteristics of the superalloy were calculated by JMatPro software. The relation between the volume percentage of microporosity and the dimensionless Niyama values were constructed. Quantitative metallographic measurements of the microporosity of the practical thin-wall casting were carried out. The prediction agreed well with the experiment in general, except for some thick-wall sites in the casting.

【 授权许可】

CC BY   
© 2013 by the authors; licensee MDPI, Basel, Switzerland.