FRACTURE ANALYSIS AND MATERIAL EVALUATION OF BUTTS FROM "F" COUPLERS CAST BEFORE MARCH 1970
The areas of fracture surfaces projected on the load-bearing planes of a group of coupler butts were measured. Division into two sub- groups of high and low mileage revealed no correlation of fracture area to mileage, but division into subgroups according to microstructure and casting defect type did give substantial increases of fatigue fracture area for components with large defects and increases of sudden rupture area for components with mixed microstructures. Standard tensile and chemical test results are given for future correlation with over-all component tensile and impact tests.
- AAR Test Division Project No. M012, Railroad Coupler Safety Research and Test Project. Metallurgical analyses complementing physical tests in Report No. 7, RRIS 03 141431.
Chicago, IL USA 60616
- FLEMING, L D
- Publication Date: 1975-10
- Features: Appendices; Figures;
- Pagination: 138 p.
- TRT Terms: Couplers; Failure; Life cycle analysis; Mechanical failure; Metallography; Metallurgy; Tension
- Uncontrolled Terms: Fatigue analysis; Observations; Tensile stress
- Subject Areas: Design; Railroads;
- Accession Number: 00141432
- Record Type: Publication
- Source Agency: Association of American Railroads Research Center
- Report/Paper Numbers: N. 8 (AAR N. R242) Tech. Rpt.
- Files: TRIS
- Created Date: Nov 3 1976 12:00AM