The effect of lattice misfit on deformation mechanisms at high temperature

Benedict M B Grant; Elisabeth Knoche; Michael Preuss; Joao Quinta Da Fonseca; Mark R. Daymond

doi:10.4028/www.scientific.net/AMR.278.144

The effect of lattice misfit on deformation mechanisms at high temperature

Benedict M B Grant, Elisabeth Knoche, Michael Preuss, Joao Quinta Da Fonseca, Mark R. Daymond

Research output: Contribution to journal › Article › peer-review

Abstract

Understanding the relationship between deformation mechanisms and microstructure is essential if one wants to fully exploit the potential of advanced nickel base superalloys and develop future alloys. In the present work, the influence of the lattice misfit between γ and γ ́ has been studied by means of in-situ loading experiments using neutron diffraction in combination with crystal plasticity modelling on RR1000 and Alloy 720Li. Both alloys were processed to generate three simplified uni-modal γ́ microstructures to allow determination of γ́ responses and experiments were carried out at 750°C. The results showed that a positive misfit strain increases the level of load partitioning from γ to γ ́ during plastic deformation introduced by uniaxial tensile loading. © (2011) Trans Tech Publications, Switzerland.

Original language	English
Pages (from-to)	144-149
Number of pages	5
Journal	Advanced Materials Research
Volume	278
DOIs	https://doi.org/10.4028/www.scientific.net/AMR.278.144
Publication status	Published - 4 Jul 2011
Event	Euro Superalloys 2010 - Freiburg, Germany Duration: 25 May 2010 → 28 May 2010

Keywords

Crystal plasticity
Load partitioning
Neutron diffraction
Superalloy

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10.4028/www.scientific.net/AMR.278.144

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title = "The effect of lattice misfit on deformation mechanisms at high temperature",

abstract = "Understanding the relationship between deformation mechanisms and microstructure is essential if one wants to fully exploit the potential of advanced nickel base superalloys and develop future alloys. In the present work, the influence of the lattice misfit between γ and γ{\' } has been studied by means of in-situ loading experiments using neutron diffraction in combination with crystal plasticity modelling on RR1000 and Alloy 720Li. Both alloys were processed to generate three simplified uni-modal {\'γ} microstructures to allow determination of {\'γ} responses and experiments were carried out at 750°C. The results showed that a positive misfit strain increases the level of load partitioning from γ to γ{\' } during plastic deformation introduced by uniaxial tensile loading. {\textcopyright} (2011) Trans Tech Publications, Switzerland.",

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AU - Grant, Benedict M B

AU - Knoche, Elisabeth

AU - Preuss, Michael

AU - Da Fonseca, Joao Quinta

AU - Daymond, Mark R.

PY - 2011/7/4

Y1 - 2011/7/4

N2 - Understanding the relationship between deformation mechanisms and microstructure is essential if one wants to fully exploit the potential of advanced nickel base superalloys and develop future alloys. In the present work, the influence of the lattice misfit between γ and γ ́ has been studied by means of in-situ loading experiments using neutron diffraction in combination with crystal plasticity modelling on RR1000 and Alloy 720Li. Both alloys were processed to generate three simplified uni-modal γ́ microstructures to allow determination of γ́ responses and experiments were carried out at 750°C. The results showed that a positive misfit strain increases the level of load partitioning from γ to γ ́ during plastic deformation introduced by uniaxial tensile loading. © (2011) Trans Tech Publications, Switzerland.

AB - Understanding the relationship between deformation mechanisms and microstructure is essential if one wants to fully exploit the potential of advanced nickel base superalloys and develop future alloys. In the present work, the influence of the lattice misfit between γ and γ ́ has been studied by means of in-situ loading experiments using neutron diffraction in combination with crystal plasticity modelling on RR1000 and Alloy 720Li. Both alloys were processed to generate three simplified uni-modal γ́ microstructures to allow determination of γ́ responses and experiments were carried out at 750°C. The results showed that a positive misfit strain increases the level of load partitioning from γ to γ ́ during plastic deformation introduced by uniaxial tensile loading. © (2011) Trans Tech Publications, Switzerland.

KW - Crystal plasticity

KW - Load partitioning

KW - Neutron diffraction

KW - Superalloy

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DO - 10.4028/www.scientific.net/AMR.278.144

M3 - Article

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EP - 149

JO - Advanced Materials Research

JF - Advanced Materials Research

T2 - Euro Superalloys 2010

Y2 - 25 May 2010 through 28 May 2010

ER -

The effect of lattice misfit on deformation mechanisms at high temperature

Abstract

Keywords

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