Crack Propagation and Microstructural Evolution of Ni-based Single Crystal Alloy Under Shear Loads. Issue 5 (May 2018)

• Record Type: Journal Article
• Authors: Ben, Li; Shiming, Zhang; Essa, F.A.; Chao, Dong; Jingui, Yu; Qiaoxin, Zhang
• Is Part Of: Xi you jin shu cai liao yu gong cheng. Volume 47:Issue 5(2018)
• Page Start: 1370
• Page End: 1376
• Publication Date: 2018-05
• Subjects: Ni-based single crystal alloy -- crack propagation -- microstructure evolution -- shear loads -- slip bands; Nonferrous metals -- Periodicals; 669.05
• DOI: 10.1016/S1875-5372(18)30137-1
• Languages: English
• ISSNs: 1875-5372

Abstract

Abstract: Crack propagation and microstructural evolution of Ni-based single crystal alloy were investigated under shear load by molecular dynamics simulations. Stress-strain, potential energy and crack growth rates were explored. Moreover, the influences of temperatures and strain rates on crack propagation were revealed. We find that the critical stress value increases with the decreasing temperature or increasing strain rate. As the temperature increases, the crack propagation is accelerated by severe thermal vibrations. Dislocations pile-up and twinning emerge at a higher strain rate, resulting in work hardening.