A STUDY OF THE STRAIN-AGE CRACK SENSITIVITY OF RENE' 41
Abstract
A program of research work directed toward the study of strain-age crack sensitivity of precipitation hardened nickel base alloys in sheet form was conducted and is described. The alloy chosen for the study was Rene' 41. A post weld heat treating procedure was devised for a restrained circular welded patch test which defined the isothermal exposure times and temperatures in the aging range where strain-age cracking occurs. Two testing procedures were developed, a constant load and a constant strain, using 'Gleeble' equipment (a time-temperature-stress device). Using the above testing procedures, it was found that a preweld overaging heat treatment eliminated the occurrence of strain-age cracking in the most crack-prone heat of 0.060 in. Rene' 41 sheet studied. The following factors were also found to reduce the strain-age crack sensitivity of Rene' 41: (1) maintaining the iron, silicon, sulfur, and manganese content at low compositional levels; (2) maintaining a finer grain size in annealed sheet than ASTM 3.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1968
- Accession Number
- AD0834707
Entities
People
- Reed E. Yount
- Thomas F. Berry
- Warren P. Hughes
Organizations
- General Electric