Machinability and surface integrity of Nitinol shape memory alloy |
| |
Authors: | Yuebin Guo Andreas Klink Chenhao Fu John Snyder |
| |
Affiliation: | 1. Department of Mechanical Engineering, The University of Alabama, Tuscaloosa, AL 35487, USA;2. Laboratory for Machine Tools and Production Engineering (WZL), RWTH Aachen University, 52074 Aachen, Germany |
| |
Abstract: | Nitinol shape memory alloys have wide applications in medical devices and actuators. However, the unique mechanical properties including superelasticity, high ductility, and severe strain-hardening make Nitinol exceedingly difficult to cut. This work determines dynamic mechanical behaviors of Nitinol in cutting. It is found that the very high strength and specific heat are responsible for large flank wear and fast tribo-chemical crater wear, respectively. The austenitic white layer in cutting is caused by deformation, while the twinned martensitic white layer is caused by quenching in EDM. Alloying from tools is negligible in cutting but unavoidable even in finish EDM trim cut. |
| |
Keywords: | Machinability Surface integrity Shape memory alloy |
本文献已被 ScienceDirect 等数据库收录! |
|