Accession Number : AD0830856

Title :   DEVELOPMENT OF NONDESTRUCTIVE TESTING SYSTEM FOR ANALYSIS AND CONTROL OF RESIDUAL MACHINING STRESSES.

Descriptive Note : Final technical rept. 6 Jan 65-28 Feb 67,

Corporate Author : IIT RESEARCH INST CHICAGO IL

Personal Author(s) : Schwartzbart, Harry

Report Date : SEP 1967

Pagination or Media Count : 293

Abstract : The report describes a program of research directed toward the following objectives: (1) To develop a nondestructive testing system for identifying the type, magnitude, direction, and distribution (including depth profile) of residual stresses; (2) To establish the relationship between grinding parameters and residual stresses generated in the grinding of several alloys of aerospace interest; and (3) To establish the effect of residual stresses on fatigue and stress-corrosion behavior. Materials utilized in the research were 4340 steel at 150 and 220 ksi strength levels, 7075-T6 aluminum, Ti-6Al-4V alloy, and TZM molybdenum. To satisfy the requirements of a nondestructive residual stress measuring system, experimental work was undertaken on ultrasonic, X-ray, elastic-plastic deformation (indentation), and beta backscatter approaches. With the ultrasonic approach it was shown that measurement of the velocity of an ultrasonic surface wave can potentially be used to provide the desired nondestructive testing system. (Author)

Descriptors :   (*NONDESTRUCTIVE TESTING, STRESSES), MACHINING, GRINDING, X RAY DIFFRACTION, ULTRASONIC RADIATION, DEFORMATION, SURFACE ROUGHNESS, FATIGUE(MECHANICS), STRESS CORROSION, STEEL, ALUMINUM ALLOYS, TITANIUM ALLOYS, MOLYBDENUM, MOLYBDENUM ALLOYS, VANADIUM ALLOYS, ZIRCONIUM ALLOYS.

Subject Categories : Fabrication Metallurgy
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE