Effect of Starting Microstructure on Material Removal Rate (MRR) of AISI 1045 Steel in (Die-Sinking) Electric Discharge Machining
Keywords:Electric discharge machining, machinability, microstructure, heat-treatment, material removal rate.
Steels are important engineering materials and widely used in daily life. General properties of steel i.e. machinability, weldability and hardness etc. are strongly influenced by their chemical composition and microstructure. In conventional machining, machinability is directly influenced by nature of microstructure, while this study would investigate the machinability of various microstructures i.e. coarse ferrite-pearlite, fine ferrite-pearlite and martensite, of AISI 1045 for a non-conventional machining process, Electric Discharge Machining (EDM). The AISI 1045 steel was quenched, normalized and annealed to develop martensite, coarse ferrite-pearlite and fine ferrite-pearlite microstructures, respectively. Material Removal Rate (MRR) of these microstructures was studied for different values of current (5, 10, 15 A), voltage (30, 60, 90 V) and tool electrode diameters (8, 15 mm) in the Die-sinking EDM process.
The MRR results revealed that the starting microstructures marginally affect the MRR for various microstructures only at higher current intensities. MRR data for electrode tool diameter comparison showed that the smaller electrode tool diameter is more sensitive to microstructures as compared to larger electrode diameter.
How to Cite
LicenseAuthors who publish with this journal agree to the following terms:
- Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
- Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).