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      Hot ductility behavior of Incoloy901 superalloy in the cast and wrought conditions

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          Abstract

          Hot ductility was investigated in Incoloy901 using hot tensile testing over a temperature range of 900 to 1 200 °C and at strain rates of 0.01 to 1 s −1, in the cast and wrought conditions. Maximum ductility was detected in the cast and wrought conditions at temperature ranges of 1 000 to 1 050 °C and 1 000 to 1 100 °C, respectively. More voids were seen at the fracture surface of the wrought specimens compared to the cast ones. At 950 °C, the formation of large and non-homogeneous voids at the fracture surface, as well as the appearance of transgranular and intergranular cracks in the wrought specimen, support moderate ductility of the alloy. Microstructural analysis does not support the occurrence of dynamic recrystallization in the cast specimens. In contrast, dynamic recrystallization in the wrought specimens at the region of maximum hot ductility promoted diffusion, leading to ductile fracture. At temperatures higher than the maximum ductility range, the formation of intergranular cracks resulted in a remarkable decline in ductility.

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          Author and article information

          Journal
          ijmr
          International Journal of Materials Research
          Carl Hanser Verlag
          1862-5282
          2195-8556
          14 April 2014
          : 105
          : 4
          : 342-349
          Affiliations
          1 Metallic Material Department, AMR of Technology, Tehran, Iran
          Author notes
          [* ] Correspondence address, Fatemeh Mohammadi Shore, Metallic Material Department, AMR of Technology, Balale 2 st, Serahe gohardasht, Karaj, 3133736698 Tehran, Iran, Tel.: +02631456589, Fax: +02631256325, E-mail: fatemehmohammadi62@ 123456yahoo.com
          Article
          MK111029
          10.3139/146.111029
          © 2014, Carl Hanser Verlag, München
          Page count
          References: 24, Pages: 8
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