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# Judy Pang <pangj@ornl.gov>
# requesting 7 days, at minimum=5 days
# beamline 34ID-E, Effects of grain boundary structure on deformation micromechanics
# instrument 34ID-E microbeam
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# top:/home/www/beamtime-requests/req00572.txt
# UNICAT Member Beam Time Request  #572
# created Tue Apr 13 16:55:09 CDT 2004
####################################################

beamline:
	34ID-E

collaboration:
	Yes

collaborator_Wenjun:
	ON

contact:
	pangj@ornl.gov

days:
	7

description:
	The proposed experiment is a continuation of the study focused on the deformation behavior of individual grains and grain boundaries in polycrystalline Ni samples. Useful information has been obtained and different behaviors across different grain boundary types have been observed. Individual grain rotations, along with sub-grain structures have been measured.  We found that we can relate the sub-grain structures observed in the individual grains to their orientations with respect to the loading axis and with respect to the orientations of their neighboring grains. To investigate the behavior of different grain boundary types, we propose to perform experiments on a set of tricrystals with controlled grain boundary structures. Experiments on samples with simple microstructures are necessary to initiate modeling calculations. One bicrystal and one tricrystal will be measured. Based on previous experiments, it is estimated 4 days will be needed for each sample.  Non-parasitic mode is required for this experiment as strain measurements are necessary.

equipment_required:
	

experiment:
	Effects of grain boundary structure on deformation micromechanics

foreign_nationals:
	

hazards:
	No safety hazards

instrument:
	34ID-E microbeam

instrument_other:
	

minimumdays:
	5

name:
	Judy Pang

nonmembers:
	Dr. Gorti Sarma (Oak Ridge National Laboratories)

unacceptable_dates:
	Month of July will not be possible. Ideal time is first or second  week of June.

z34ID_change_undulator:
	yes

z34ID_details:
	Energy scan will be needed and the operational setting will be dependent on the measurements at the time.

z34ID_on_axis:
	no

z34ID_parasitic:
	no

z34ID_taper:
	yes


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