The results show that in TCS processed K424,dendrite arms were coarser,SDAS was larger,the amount and size of microporosity of TCS pro- cessed K424 alloy is smaller,and its density is higher by about 1% than that in conventionally cast K424.

The results show that there was obvious microporosity at the positions indicated by fluorescence,and clear grinding traces and some local microcracks were found at the dovetails.

Present Status of Numerical Simulation of Micro-porosity in Aluminum Alloys;

Less optimized casting parameters can cause micro-porosity,which is very detrimental to the stress rupture and fatigue properties of the aerospace components.

s:The cracks in the captioned strip in cold rolling are tested and preliminarily analyzed with the results showing that the fine cracks in the lower surface of the cast strip leads to the cracks in the strip during coiling ard rolling due to repeated action of drawing stresses and that the internal cracks like earthworms have gradually evolved from microporosity.

The microporosity on tensile break of cast iron is observed by SEM.

Effect of electric current pulse on shrinkage cavity and porosity in casting ZA27 alloy;

Factor Analysis and Countermeasures of Porosity and Pipe in Ingot;

In this paper, analysis on the fissuring accident of ZGMn13Cr2Mo antifriction tup is performed, and the reason is believed to lie in serious casting defects of shrinkage cavity, porosity and inclusion.