Rai, R K and Sahu, J K (2018) Substructural evolution in a directionally solidified nickel-base superalloy during relaxation fatigue tests at 850 degrees C. Materials Letters, 230 (IF-3.019). pp. 241-244.
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This paper reports new dislocation configurations responsible for cyclic hardening/softening behaviour of a directionally solidified nickel base superalloy after relaxation fatigue tests at 850 degrees C with hold durations of 1 and 5 min. Dislocation interactions in the gamma (gamma)-matrix and the formation of new dislocation configurations during relaxation fatigue (RF) test with 1 min hold duration is responsible for the cyclic hardening behaviour, whereas, the coarsening of gamma prime (gamma')-precipitates are attributed to the cyclic softening behaviour during 5 min hold testing. (C) 2018 Elsevier B.V. All rights reserved.
|Uncontrolled Keywords:||Relaxation-fatigue test;Superalloy;Microstructure;Electron microscopy|
|Divisions:||Material Science and Technology|
|Deposited By:||Sahu A K|
|Deposited On:||19 Sep 2019 12:27|
|Last Modified:||19 Sep 2019 12:27|
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