TY - JOUR
T1 - In situ measurement of deformation mechanics and its spatio-temporal scaling behavior in equal channel angular pressing
AU - Moradi, Marzyeh
AU - Basu, Saurabh
AU - Shankar, Meenakshisundaram Ravi
N1 - Publisher Copyright:
© 2015 Materials Research Society.
PY - 2015/11/17
Y1 - 2015/11/17
N2 - Deformation mechanics in equal channel angular pressing (ECAP) was studied in situ using digital image correlation (DIC) and infra-red (IR) thermography. In a prototypical experiment in an optical and IR transparent die, the deformation of commercially pure lead (Pb) is observed using high-speed optical and IR cameras. From the resulting time-sequence images of metal-flow in the deformation zone, DIC is used to characterize the zone of severe plastic deformation (SPD) as a function of the scale of deformation (sample dimensions), deformation speed, and die geometry. The temperature rise in the deformation zone was characterized using IR thermography and the results were compared against theoretical estimates. These observations provide direct insights into the mechanics of SPD in ECAP, which can offer strategies for microstructure control, process optimization, and miniaturization of ECAP.
AB - Deformation mechanics in equal channel angular pressing (ECAP) was studied in situ using digital image correlation (DIC) and infra-red (IR) thermography. In a prototypical experiment in an optical and IR transparent die, the deformation of commercially pure lead (Pb) is observed using high-speed optical and IR cameras. From the resulting time-sequence images of metal-flow in the deformation zone, DIC is used to characterize the zone of severe plastic deformation (SPD) as a function of the scale of deformation (sample dimensions), deformation speed, and die geometry. The temperature rise in the deformation zone was characterized using IR thermography and the results were compared against theoretical estimates. These observations provide direct insights into the mechanics of SPD in ECAP, which can offer strategies for microstructure control, process optimization, and miniaturization of ECAP.
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U2 - 10.1557/jmr.2015.38
DO - 10.1557/jmr.2015.38
M3 - Article
AN - SCOPUS:84926386952
SN - 0884-2914
VL - 30
SP - 798
EP - 810
JO - Journal of Materials Research
JF - Journal of Materials Research
IS - 6
ER -