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Brittle‐to‐ductile transition temperature in InP
Author(s) -
BayuAji Leonardus B.,
Pirouz P.
Publication year - 2010
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.200925347
Subject(s) - indentation , brittleness , materials science , deformation (meteorology) , fracture (geology) , transition temperature , composite material , hydrostatic equilibrium , strain rate , hydrostatic stress , stress (linguistics) , condensed matter physics , structural engineering , finite element method , linguistics , philosophy , physics , superconductivity , quantum mechanics , engineering
Deformation experiments were conducted on monocrystalline InP by 4‐point bend tests as well as by conventional and depth‐sensing indentation (DSI) tests. Temperature ranges where the material exhibited a brittle or a ductile behavior were investigated with particular focus on the transition from one deformation mode to the other. The 4‐point bend tests show that InP exhibits a sharp brittle‐to‐ductile transition (BDT) temperature within 5° between 350 and 355 °C at a strain rate of 2.9 × 10 −5 s −1 . The indentation BDT (IBDT) temperature is found to be significantly lower at ∼250 °C. The difference of nearly 100 °C between the two techniques is attributed to the hydrostatic component of the indentation stress field that suppresses fracture and shifts the transition to a lower temperature.