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The effect of Nb solute and NbC precipitates on dynamic and metadynamic recrystallisation in Ni-30Fe-Nb-C model alloys

Journal Article


Abstract


  • Dynamic and metadynamic recrystallisation behaviour of Ni-30Fe-Nb-C model alloys during plane strain compression was investigated by optical and electron microscopy. The dynamically recrystallised grains were primarily located at the pre-existing grain boundaries with few additional new recrystallised grains in the prior grain interior. A limited nucleation of recrystallised grains at >400 nm size NbC particles was also evident. On the other hand, smaller semi-coherent particles (~10-150 nm) severely inhibit the dislocations rearrangement and subgrain boundary mobility, thus leading to sluggish or even suppressed dynamic and metadynamic recrystallisation. These smaller NbC particles maintained cube-on-cube orientation relationship with austenite matrix (001)NbC||(001)¿, [001]NbC||[001]¿. The shape of the NbC particles changes from nearly ellipsoidal to octahedral followed by hexagonal and tetra-kai-decahedral by truncation of {111} facets by {001} ones.

Publication Date


  • 2017

Citation


  • Mannan, P., Casillas-Garcia, G. & Pereloma, E. V. (2017). The effect of Nb solute and NbC precipitates on dynamic and metadynamic recrystallisation in Ni-30Fe-Nb-C model alloys. Materials Science and Engineering A: Structural Materials: Properties, Microstructure and Processing, 700 116-131.

Scopus Eid


  • 2-s2.0-85020208904

Number Of Pages


  • 15

Start Page


  • 116

End Page


  • 131

Volume


  • 700

Place Of Publication


  • Netherlands

Abstract


  • Dynamic and metadynamic recrystallisation behaviour of Ni-30Fe-Nb-C model alloys during plane strain compression was investigated by optical and electron microscopy. The dynamically recrystallised grains were primarily located at the pre-existing grain boundaries with few additional new recrystallised grains in the prior grain interior. A limited nucleation of recrystallised grains at >400 nm size NbC particles was also evident. On the other hand, smaller semi-coherent particles (~10-150 nm) severely inhibit the dislocations rearrangement and subgrain boundary mobility, thus leading to sluggish or even suppressed dynamic and metadynamic recrystallisation. These smaller NbC particles maintained cube-on-cube orientation relationship with austenite matrix (001)NbC||(001)¿, [001]NbC||[001]¿. The shape of the NbC particles changes from nearly ellipsoidal to octahedral followed by hexagonal and tetra-kai-decahedral by truncation of {111} facets by {001} ones.

Publication Date


  • 2017

Citation


  • Mannan, P., Casillas-Garcia, G. & Pereloma, E. V. (2017). The effect of Nb solute and NbC precipitates on dynamic and metadynamic recrystallisation in Ni-30Fe-Nb-C model alloys. Materials Science and Engineering A: Structural Materials: Properties, Microstructure and Processing, 700 116-131.

Scopus Eid


  • 2-s2.0-85020208904

Number Of Pages


  • 15

Start Page


  • 116

End Page


  • 131

Volume


  • 700

Place Of Publication


  • Netherlands