|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Defects and Properties of Cast Metals
||Role of Grain Refiners on Porosity Formation in Directionally Solidifed Al-Si Alloys
||Muhammet Uludag, Derya Dispinar
|On-Site Speaker (Planned)
Mechanical properties of aluminum alloys can be improved by alloying element addition where the microstructure is modified to enhance properties. Grain refinement is one of the methods and Ti is the preferred choice in the form of AlTi5B1 master alloy. Disadvantage of Ti grain refinement is the fading effect to due sedimentation. Alternatively, Ti-free Al-B grain refiners are also used. In this work, A356, A380 and A413 alloys were used and directional solidification apparatus was established in order to investigate porosity distribution. Sampling was made along the cast part and both vertical and horizontal sections were analyzed. Pore size, number of pores and average pore length were statistically measured. It was found that porosity was decreased in all three Al-Si alloy when Al-B grain refiners were used.
||Planned: Supplemental Proceedings volume