Phase segregation susceptibility of ZA27 alloy at different shear rates

Mola, J ; Sharif University of Technology | 2006

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  1. Type of Document: Article
  2. DOI: 10.4028/3-908451-26-4.225
  3. Publisher: Trans Tech Publications Ltd , 2006
  4. Abstract:
  5. Back extrusion technique was employed to characterize phase segregation tendency of mechanically stirred ZA27 alloy at different deformation rates. Variation of segregation intensity with ram diameter was found to follow opposite trends at low and high ram speeds. At sufficiently high ram speeds, small rams are of better performance in minimizing segregation whereas at low ram speeds, large rams result in less pronounced segregation. In addition, increasing ram speed invariably decreases segregation degree. Back extrusion at very high shear rates provided via a Drop Extruder Apparatus capable of displacing ram at speeds in excess of 1m/s results in production of very homogeneous products in terms of solid fraction as well as size distribution of globules
  6. Keywords:
  7. Metal extrusion ; Optimization ; Phase separation ; Shear deformation ; Size distribution ; Supersaturation ; Back extrusion ; Phase segregation susceptibility ; Segregation intensity ; Semi-solid processing ; Binary alloys
  8. Source: 9th International Conference on Semi-Solid Processing of Alloys and Composites, S2P 2006, Busan, 11 September 2006 through 13 September 2006 ; Volume 116-117 , 2006 , Pages 225-230 ; 10120394 (ISSN); 3908451264 (ISBN); 9783908451266 (ISBN)
  9. URL: https://www.scientific.net/SSP.116-117.225