Accession Number:

ADA019495

Title:

Atomatic X-Ray Diffraction Machine Measurement of Residual Stress in Aluminum Alloys

Descriptive Note:

Master's thesis

Corporate Author:

AIR FORCE INST OF TECH WRIGHT-PATTERSONAFB OH SCHOOL OF ENGINEERING

Personal Author(s):

Report Date:

1975-12-01

Pagination or Media Count:

70.0

Abstract:

Fastress automatic x-ray diffraction machine measurement of stress in aluminum alloys is compared with stress determined by strain gage and conventional x-ray diffraction techniques. Modification of the Fastress specimen positioner and operating procedures were required for acceptable performance. The modified machine and procedures resulted in measurement of stress in 2024-T6 aluminum alloy with a maximum error of 3,400 psi and a mean error of 2,600 psi compared to the strain gage measurements. Fastress values agreed within 1,000 psi of residual stresses determined by conventional x-ray diffraction methods. Test of a shot-peened 2024-T6 aluminum alloy resulted in a maximum error of 4, 600 psi and a mean error of 2,000 psi compared to a strain-gage-determined stress.

Subject Categories:

  • Metallurgy and Metallography

Distribution Statement:

APPROVED FOR PUBLIC RELEASE