Anomalous influence of polarity in sink EDM of titanium alloys
Anomalous influence of polarity in sink EDM of titanium alloys
复制标题
DOI：
10.1016/j.cirp.2018.04.069
复制
发表时间：
2018-01-01
影响因子：
4.1
通讯作者：
Schwedt, Alexander
中科院分区：
文献类型：
--
作者：
Holsten, Maximilian;Koshy, Philip;Schwedt, Alexander
在电火花加工（EDM）中通常采用阳极工具极性，以使材料去除相对于工具磨损最大化。然而，Ti和Ti6 Al 4V的电火花加工是非典型的，因为这些材料需要阴极工具极性。增加了阴谋是γ-TiAl，它的机器更好地在传统的阳极极性。这项研究的重点是通过研究在一系列相关工艺条件下的去除机制来澄清这种有趣行为背后的现象。的异常被证明产生的极性依赖的性质和程度的TiC形成的工作表面上，这显着影响材料去除。(C)2018由Elsevier Ltd代表CIRP发布。
An anodic tool polarity is generally adopted in sink electrical discharge machining (EDM) to maximize material removal relative to tool wear. Sink EDM of Ti and Ti6Al4V is however atypical in that these materials necessitate a cathodic tool polarity. Adding to the intrigue is gamma-TiAl, which machines better under the conventional anodic polarity. This research focused on clarifying the phenomena behind this interesting behavior by investigating removal mechanisms over a range of relevant process conditions. The anomaly is demonstrated to arise from the polarity-dependent nature and extent of TiC formation on the work surface, which significantly affects material removal. (C) 2018 Published by Elsevier Ltd on behalf of CIRP.