Abstract
The study investigated the effects of thermal-cold cycling (TCC) treatment on the microstructure and mechanical properties of hot isostatic pressed (HIP) beryllium. The microstructure changes during TCC process, including alterations in grain boundary contents, grain size, geometrically necessary dislocations density, indicated that the reinforcing effect of -196°C–200°C and -196°C–400°C TCC was superior to that of -60°C–200°C and -100°C–200°C TCC. Consequently, compared to HIP beryllium and other TCC treated beryllium, the tensile strength and yield strength of beryllium after 16 TCCs of -196°C–200°C showed the greatest improvement, increasing from 430 MPa and 383 MPa to 450 MPa and 403 MPa, respectively. Similarly, the residual tensile strength and retention rate after room temperature creep at 100 MPa for 1000h increased from 360 MPa and 83.9% to 393 MPa and 87.3%, respectively.
Published Version
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