Release Time:2019-03-12  Hits:

Indexed by: Journal Article

Date of Publication: 2017-03-01

Journal: INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY

Included Journals: Scopus、EI、SCIE

Volume: 89

Issue: 1-4

Page Number: 371-375

ISSN: 0268-3768

Key Words: Hydrogen treatment; Ti-6Al-4V; Machining

Abstract: The paper investigated how hydrogen, introduced via thermal diffusion, influenced the formation and morphology of chips formed by cutting Ti-6Al-4V alloys. The chips' microstructure and characteristics were studied by using optical microscopy (OM), X-ray diffraction (XRD), and scanning electron microscopy (SEM). Experimental results demonstrated that with an increase in plasticity, the lamellar chips transformed to saw-tooth chips. Metallurgical analysis suggested that the saw-tooth chips formed because of thermoplastic instability caused by large plastic deformation. In contrast, the lamellar chips formed because of crack initiation.