#
# arev:/usr/local/unicat/unireq/beamreq/req00079.txt
# UNICAT Member Beam Time Request  #79

# created Tue Sep 21 16:36:32 CDT 1999
#

collaboration:
	No

collaborator+Paul:
	on

days:
	2

description:
	We would like sample a deeper volume of material, 
	to measure the stresses at depths near 50-100 microns.
	Stress have been measured at 17.5 and 25 keV at NSLS.  Laboratory 
	XRD measurements will be done at low x-ray energies (5-8 keV)and
	using neutron diffraction.  Lastly, using low energy x-ray and a layer removal
	technique, the stresses as a function of depth will be measured again.  
	Finally all measurements will be compared.
	
	These measurements will to be made on two parts, using radiation at 
	30 keV.  The measurements need to be done on one high angle reflection.
	We would like to measure three Phi angles; 0, 45 %26 90 degrees.
	We need to measure both positive and negative Psi angles. 
	(3 phi x7 psi = 21 scans per sample)
	

equipment+required:
	Kappa Goniometer, appropriate fixturing. 
	Sample 1 is an I beam, approximatly 2" X 1" X 1" overall, with a 1/2" web thickness
	Sample 2 is a 2-3/4" diameter puck shape, 5/8" thick
	Measurements of the puck will be on the periphery.

experiment:
	Residual stresses in diesel engine components.

hazards:
	There are none.

name:
	Tom Watkins

new+request:
	on

nonmembers:
	Tom Watkins, HTML, ORNL
	Roger England, Cummins Engine Company

station:
	33ID-D

unacceptable+dates:
	The suggested visit dates from Gene Ice are November 9 through 16.
	These dates are acceptable to both investigators.



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