What is shot peening How might a peening operation increase

What is shot peening? How might a peening operation increase the fracture resistance of a product?

Solution

Shot peening has been developed recently to improve the fatigue strength of metal by setting up compressive stress in the surface . The process is carried out by blasting or hurling a rain of small shots pneumatically or mechanically at high velocity aganist the work surface . Small indentation are produced due to striking of shots , which causes the metal to flow plastically to a depth of few tenth of mm . This process is adopted to remove stress concentration on parts of irregular shape at local area.