CORRELATION OF MICROSTRUCTURES WITH FRACTURE TOUGHNESS PROPERTIES IN METALS

Ti-6Al-4V alloy was studied in three mill product forms for the purpose of establishing a correlation between microstructure and fracture toughness. Tension test, fracture toughness, and crack growth rate properties were determined. Light microscopy, scanning electron microfractography, and transmission electron microscopy were the metallographic means employed. A key factor in the microstructural and fracture toughness differences is cooling rate. The fatigue crack propagation rate was found to vary widely among the different microstructures. There was some correlation between microfractographic modes and fracture toughness. (Modified author abstract)

• Corporate Authors:

  Lockheed Missiles and Space Company

  Palo Alto Research Laboratory
  Palo Alto, CA  United States  94304
• Authors:
  • Crossley, F A
  • Lewis, R E
• Publication Date: 1973-9-30

Media Info

• Pagination: 130 p.

Subject/Index Terms

• TRT Terms: Cracking; Electron microscopy; Fatigue cracking; Fracture mechanics; Titanium alloys
• Uncontrolled Terms: Crack propagation
• Subject Areas: Marine Transportation; Materials;

Filing Info

• Accession Number: 00053921
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: LMSC-D356114 Final Rpt
• Contract Numbers: N00019-72-C-0545
• Files: TRIS
• Created Date: May 7 1974 12:00AM