SURFACE QUALITY IN TURNING HEAT-RESISTANT MATERIALS,
Abstract
A presentation is made of the results of a study of the cold hardening and residual stresses occurring with the turning of titanium alloys VTZ-1, VT14, and with heat resistant steel EI787. An effort is also made to describe certain phenomena resulting from the relationship of the temperature in the cutting zone and the residual stresses. Measurements were made of the effect of the type of cutting, instrument wear, and forward angle on the thickness of the cold-hardened layer, and as the result of these measurements a range is established for the intensity and depth of cold-hardening. Data on residual stresses point out that in turning EI787 steel tensile stresses develop in the upper layers of the material, while the residual stresses in the titanium alloys VTZ-1 and VT14 prove to be compressive. Quantitative estimates of the residual stresses are developed for each type of material. Some analysis is made of the relationship of the materials' fatigue properties and the residual stress values. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 11, 1970
- Accession Number
- AD0704849
Entities
People
- B. S. Korotin
- F. P. Uryvskii
Organizations
- National Air and Space Intelligence Center