NASACR163068 I S ~,3 Materials for .. Helicopter Gears
Fatigue Crack Growth as Influenced by 43 Intensity of Stress Comparison of Single Vacuum and Double 45 Vacuum Melt Threshold Fatigue Crack Propagation Char 46 acteristics for Single and Double Vacuum Melt Influence of Preoxidation On Carhurizing 51 Characteristlcs of CBS 600, CBS 1000M, and X2 Steels.