| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
100 Years and Still Cracking: A Griffith Fracture Symposium
|
| Presentation Title |
2,000 Years and Still Getting Dull: Mechanisms of Blade Chipping |
| Author(s) |
Gianluca Roscioli, S. Mohadeseh Taheri-Mousavi, Cemal Cem Tasan |
| On-Site Speaker (Planned) |
Gianluca Roscioli |
| Abstract Scope |
In order to achieve high hardness and wear resistance at a reasonable cost, blade steels are often engineered to have martensitic microstructures with high carbide content. Yet these materials become practically unusable upon interacting with materials more than 50 times softer. Considering a shaving process in detail, we have experimentally demonstrated that the stress imparted by the hair being cut is sufficient, under specific circumstances, to produce ductile fracture in the steel and chip the blade prior to appreciable wear. Using 3D parametric finite element simulations, we have shown that failure occurs when the combination of three separate factors occurs: (i) large mode III component in the stress, (ii) particular position of the hair relative to an asperity along the sharp edge, and (iii) presence of spatial variation of the heterogeneous lath martensite structure along the sharp edge. The change in failure mechanisms with increasing corrosion severity is also investigated. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Mechanical Properties, Iron and Steel, Modeling and Simulation |