Accession Number : AD0785009

Title :   Acoustic Emissions and Stress-Corrosion Cracking in High-Strength Alloys.

Descriptive Note : Final rept.,

Corporate Author : NAVAL RESEARCH LAB WASHINGTON D C

Personal Author(s) : Tucker,T. R. ; Fujii,C. T.

Report Date : AUG 1974

Pagination or Media Count : 15

Abstract : The usefulness of acoustic emission data (i.e., stress wave emission - SWE) to studies of stress-corrosion cracking (SCC) of high-strength alloys was explored. Single-edge-notched, precracked cantilever specimens were used to study the stress-corrosion-crack growth and SWE characteristics of a high-strength stainless steel and a titanium alloy. SWE data correlate reasonably well to crack growth measurements by conventional beam deflection techniques for high-strength stainless steel but is too insensitive for reliable detection of crack extension in the titanium alloy. The use of SWE data to define the energetics of discrete cracking events are currently beyond the capabilities of existing equipment and analytics. (Author)

Descriptors :   *Stress corrosion, *Stainless steel, *Titanium alloys, *Acoustic emissions, *High strength alloys, Stress waves, Test methods

Subject Categories : Properties of Metals and Alloys

Distribution Statement : APPROVED FOR PUBLIC RELEASE