Improving the shotbalsting process for making crossbow springs using x-ray diffraction for measuring residual strength

Abstract

Different residual strenght profiles were measured by X-Ray diffraction in areas close to the sufrace of AISI-SAE 5160H steel used in making crossbow springs. Different shotblasting conditions were used and an experimental design was developed for finding process conditions offering suitable Almen intensity and residual strength profile when compression was applied. The combination of variables was chosen which tended to present the most suitable results within the parameters used in making springs in the same conditions, cycle them and determine their behaviour in fatigue tests.

Keywords

• X-ray diffraction
• residual strength
• fatigue
• fatigue-freeting
• shotblasting
• almen
• SEM