BERYLLIUM FORGINGS FOR TURBINE ENGINE COMPONENTS.
Abstract
Full-scale blades, discs, and hollow shafts were produced for evaluation in turbine engine applications using forging techniques which imparted controlled texture to the beryllium via reversal of metal flow during multiple-operation forging sequences. The best balance of ductility was achieved for the discs, which also had lowest tensile strengths and poorest environmental test results. The blade forgings also had a good balance of ductility in the attachment section, but tensile yield strength had been reduced to the level of the starting vacuum hot pressed block during final forging stages. High strength in the axial and circumferential directions and good environmental test results were attained in the shaft forging which was highly directional and had a maximum preferred orientation of 4.5 times random. Redirection of program effort established the effects of deformation processing parameters upon microstructure, crystallographic orientation, impact resistance, and tensile properties of wrought beryllium. Separate investigations were conducted for beryllium which was forged uniaxially, biaxially, and given a combination of uniaxial and biaxial deformation. Amounts of reduction, forging temperatures, and intermediate and post-forging thermal treatments were evaluated. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1967
- Accession Number
- AD0828982
Entities
People
- Arthur F. Hayes