TY - JOUR
T1 - Deformation behavior of Mo5Si3 single crystal at high temperatures
AU - Yoshimi, K.
AU - Yoo, M. H.
AU - Wereszczak, A. A.
AU - Borowicz, S. M.
AU - George, E. P.
AU - Miura, E.
AU - Hanada, S.
PY - 2002/6/1
Y1 - 2002/6/1
N2 - Compressive deformation behavior of D8m-type Mo5Si3 single crystals was investigated at temperatures between 1473 and 1723 K in an argon atmosphere. Four compression axes, namely [001], near-[111], near [101] and [100] were chosen. Plasticity occured at and above 1573 K, whereas at 1473 K the crystal failed by brittle fracture before yielding. After high-temperature yielding, all crystals except the [001] crystal exhibited a large yield drop, followed by an apparent steady state flow. Slip traces of {110} and other relatively low index planes were observed on crystal surfaces. Dislocations were characterized on (001) slip plane by TEM, and <110>(001) slip was identified. Considering the constant-stress flow behavior as a steady-state creep process, it was estimated that a stress component is about 6 and an apparent activation energy of deformation is approximately 490 kJ mol-1.
AB - Compressive deformation behavior of D8m-type Mo5Si3 single crystals was investigated at temperatures between 1473 and 1723 K in an argon atmosphere. Four compression axes, namely [001], near-[111], near [101] and [100] were chosen. Plasticity occured at and above 1573 K, whereas at 1473 K the crystal failed by brittle fracture before yielding. After high-temperature yielding, all crystals except the [001] crystal exhibited a large yield drop, followed by an apparent steady state flow. Slip traces of {110} and other relatively low index planes were observed on crystal surfaces. Dislocations were characterized on (001) slip plane by TEM, and <110>(001) slip was identified. Considering the constant-stress flow behavior as a steady-state creep process, it was estimated that a stress component is about 6 and an apparent activation energy of deformation is approximately 490 kJ mol-1.
KW - High temperature
KW - Intermetallic compound
KW - Mechanical properties
KW - Molybdenum silicide
KW - Single crystal
UR - http://www.scopus.com/inward/record.url?scp=0036602320&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0036602320&partnerID=8YFLogxK
U2 - 10.1016/S0921-5093(01)01578-7
DO - 10.1016/S0921-5093(01)01578-7
M3 - Article
AN - SCOPUS:0036602320
VL - 329-331
SP - 228
EP - 234
JO - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
JF - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
SN - 0921-5093
ER -