The gradient crystalline structure and microhardness in the treated layer of TC17 via high energy shot peening

- The gradient nanocrystalline structure was induced in treated layer of TC17.
- The thickness of nanograin layer with an average grain size of 10.5 nm was 20 μm.
- The composition of the treated layer of TC17 was discussed.
- The gradient variation of the microhardness was obtained in treated layer of TC17.