| COMPENDEX Antwortnummer 4 - © 1998 EI |
| Title |
| | Ultrasonic measurement of residual stress in railroad wheel rims. |
| Author |
| | Schramm, R.E. (Natl Inst of Standards and Technology); Clark, A.V.; McGuire, T.J. |
| Meeting Title |
| | Tenth International Wheelset Congress. |
| Meeting Location |
| | Sydney, Aust |
| Meeting Date |
| | 27 Sep 1992-01 Oct 1992 |
| Meeting Title |
| | Tenth International Wheelset Congress. |
| Organization |
| | Bradken Australia Pty Ltd; Clyde Engineering; Electrologic Pty Ltd; Futuris Industrial Products Pty Ltd; A Goninan & Co Ltd; et al |
| Meeting Location |
| | Sydney, Aust |
| Meeting Date |
| | 27 Sep 1992-01 Oct 1992 |
| Publication Source |
| | National Conference Publication - Institution of Engineers, Australia n 92 pt 10.Publ by IE Aust, Barton, Aust.p 151-155
CODEN: NPIEDX ISSN: 0313-6922 |
| Publication Year |
| | 1992 |
| Meeting Number |
| | 17777 |
| Document Type |
| | Conference Article |
| Treatment Code |
| | Theoretical; Application; Experimental |
| Language |
| | English |
| Abstract |
| | This work discusses three possible acoustic measurement techniques to detect and quantify the stress railroad wheel rims.The goal is to develop instrumentation useful for nondestructive testing during field inspection for potentially dangerous conditions.In each case, the application of novel noncontact transducers (EMATs) takes advantage of minimal surface preparation and the elimination of fluid couplants.Each technique depends on the very precise (one part in 104) timing of signal arrival.Elastic changes caused by stress generate very small, but detectable velocity changes. However, other factors, notably changes in metallurgical texture, will similarly alter the velocity.Initial tests indicate the possibility of determining the size of the texture effect and reducing the uncertainty in measured stress to about 55 MPa or less.This accuracy would allow judgement on the safety of continued operation of a wheel.For one method, a birefringence approach, we have constructed a prototype that is now at a railroad research center.Ultrasonic data collected with this gear correlate well those from destructive sawcutting for the four wheels we have examined so far.Work on the design and construction of transducers and data analysis continues.(Author abstract) 22 Refs. |
| Accession Number |
| | 93(5):67159 |
