Research Article
Mathematical Modeling and Finite Element Analysis of Residual Stress (RS) Field after Multipass Ultrasonic Surface Rolling
Table 1
Mechanical parameters of the target and the ball.
| | Materials | Target untreated 18CrNiMo7-6 | Ball WC alloy |
| | Density (kg⋅m−3) | 7900 | 15000 | | Young’s modulus E (GPa) | 195 | 710 | | Poisson’s ratio μ | 0.35 | 0.21 | | Yield strength (MPa) | 502 | — | | Yield strain | 0.38% | — | | Tensile strength (MPa) | 754 | — | | Hardening parameter (MPa) | 3177 | — |
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