Influence of Recast Layer on the Fatigue Life of Ti6Al4V Processed by Electric Discharge Machining

• Autorzy: Eakambaram A. , Xavior M. A.

Identyfikatory

DOI

10.24425/amm.2019.130124

• Języki publikacji: EN

Abstrakty

EN

In this research work, Ti6Al4V alloy material was subjected to electric discharge machining (EDM) and its fatigue life was investigated at low cycle fatigue mode. In order to evaluate the influence of recast layer generated during the machining process on the fatigue life, samples prepared using end milling process were also subjected to similar tests and a comparative analysisis presented. Data were observed in the fully reversed fatigue mode at room temperature using samples fabricated as per ASTM standard E606. The specimen were machined on a spark electric discharge die sink machine which were subjected to fatigue, and the recorded fatigue lives were compared with the fatigue life of end milled specimen. The machined surfaces were examined through optical and scanning electron microscopes, and the roughness was measured with a standard profilometer. It was observed that when the discharge current is augmented, the recast layer formed was in the range of 20 to 70 μm thick. From the results, it is being concluded that fatigue life of the samples fabricated by EDM is less for various load conditions when compared with that of the end milled sample. The milled sample at 160 MPa load exhibited 2.71×10⁵ cycles, which is 64% more when compared to EDM sample.

Słowa kluczowe

EN

Ti6Al4V; EDM; recast layer; fatigue; residual stress

• Wydawca: Institute of Metallurgy and Materials Science of Polish Academy of Sciences ; Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences
• Czasopismo: Archives of Metallurgy and Materials
• Rocznik: 2019
• Tom: Vol. 64, iss. 4
• Strony: 1541--1548
• Opis fizyczny: Bibliogr. 23 poz., fot., rys., tab.

Twórcy

autor

Eakambaram A.

• Arunai Engineering College, Department of Mechanical Engineering, Thiruvannamalai, India

autor

Xavior M. A.

• School of Mechanical Engineering, Vellore Institute of Technology, Vellore - 632014, India

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