A review of the MAXUS 8 sounding rocket microgravity experiment to investigate solidification structures in a Ti-Al-Nb intermetallic alloy is presented. The experiment was part of the Intermetallic Materials Processing in Relation to Earth and Space Solidification (IMPRESS) EU FP6 project. Key objectives were to investigate columnar and equiaxed solidification, and to achieve Columnar-to-Equiaxed Transition (CET) in the alloy. A microgravity experiment was designed to achieve this using a controlled power-down method. Two alloys were tested: one inoculated with a grain refiner and the other without grain refinement. Unrefined samples displayed axial and radial columnar growth. Boride inoculated samples displayed an equiaxed structure. No clear CET was achieved. The design, détails, and results of the experiment are presented.
|Title of host publication||Proceedings of the 20th ESA Symposium on European Rocket and Balloon Programmes and Related Research|
|Number of pages||6|
|Publication status||Published - 1 Dec 2011|
|Event||20th ESA Symposium on European Rocket and Balloon Programmes and Related Research - Hyere, France|
Duration: 22 May 2011 → 26 May 2011
|Conference||20th ESA Symposium on European Rocket and Balloon Programmes and Related Research|
|Period||22/05/11 → 26/05/11|