Authors: Weizhi Luan Chuanhai Jiang Vincent Ji Haowei Wang
Publish Date: 2009/05/01
Volume: 44, Issue: 10, Pages: 2454-2458
Abstract
The influence of shot peening on the surface mechanical properties of the TiB2/6351Al composite has been investigated The microstructures were determined by Xray diffraction line profile analysis The results showed that the increment of hardness was about 50 in the top surface layer The matrix proof stress σ02 of the shot peened surface had been increased by 27 and the whole strength increment was about 21 by considering the contribution of the reinforcements The domain size and the dislocation density in the strengthened surface were 55 nm and 367 × 1015 m−2 respectively The mechanical properties improvement of the modified surface was partially due to the reinforcements but mainly due to the fine domains high value of dislocation density induced by shot peening
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