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Hot ductility of a Fe-Ni-Co alloy in cast and wrought conditions

Yazdani, M ; Sharif University of Technology | 2011

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  1. Type of Document: Article
  2. DOI: 10.1016/j.matdes.2011.01.051
  3. Publisher: 2011
  4. Abstract:
  5. The hot ductility of Fe-29Ni-17Co alloy was studied in both cast and wrought conditions by hot tensile tests over temperature range of 900-1250°C and at strain rates of 0.001-1s-1. Over the studied temperature range, the wrought alloy represented higher elongation and reduction in area as compared to the cast alloy. Dynamic recrystallization was found responsible for the higher hot ductility of the wrought alloy and the improvement of hot ductility of the cast alloy at high temperatures. At temperature range of 1000-1150°C the wrought alloy exhibited a hot ductility drop while a similar trough was not observed in case of the cast alloy. It was also found that at temperatures of 1150-1250°C the best hot ductility is achieved in both cases of cast and wrought alloy. The experimental data of flow stress were constitutively analyzed and the apparent activation energy of deformation was estimated to be 344kJ/mol
  6. Keywords:
  7. Apparent activation energy ; Cast alloys ; Cast and wrought ; Experimental data ; Flow stress ; High temperature ; Hot ductility ; Hot-tensile tests ; Ni-Co alloy ; Reduction in area ; Temperature range ; Wrought alloys ; Activation energy ; Cobalt alloys ; Ductility ; Dynamic recrystallization ; Strain rate ; Tensile testing ; Alloys
  8. Source: Materials and Design ; Volume 32, Issue 5 , 2011 , Pages 2956-2962 ; 02641275 (ISSN)
  9. URL: http://www.sciencedirect.com/science/article/pii/S0261306911000719