A Lattice-Misfit-Dependent Damage Model for Non-linear Damage Accumulations Under Monotonous Creep in Single Crystal Superalloys Academic Article

abstract

• 2018, The Minerals, Metals & Materials Society and ASM International. A lattice-misfit-dependent damage density function is developed to predict the non-linear accumulation of damage when a thermal jump from 1050C to 1200C is introduced somewhere in the creep life. Furthermore, a phenomenological model aimed at describing the evolution of the constrained lattice misfit during monotonous creep load is also formulated. The response of the lattice-misfit-dependent plasticity-coupled damage model is compared with the experimental results obtained at 140 and 160MPa on the first generation Ni-based single crystal superalloy MC2. The comparison reveals that the damage model is well suited at 160MPa and less at 140MPa because the transfer of stress to the phase occurs for stresses above 150MPa which leads to larger variations and, therefore, larger effects of the constrained lattice misfit on the lifetime during thermo-mechanical loading.

authors

• Le Graverend, Jean-Briac

published proceedings

• METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE

author list (cited authors)

• Le Graverend, J.

citation count

• 0

complete list of authors

• Le Graverend, J-B

publication date

• September 2018

publisher

• Springer Nature  Publisher

published in

• Metallurgical and Materials Transactions A  Journal

keywords

• 40 Engineering
• 4016 Materials Engineering

Digital Object Identifier (DOI)

• 10.1007/s11661-018-4681-5

start page

• 4126

end page

• 4133

volume

• 49A

issue

• 9

URL

• http://dx.doi.org/10.1007/s11661-018-4681-5