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论文类型：期刊论文

发表时间：2017-03-01

发表刊物：INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY

收录刊物：SCIE、EI、Scopus

卷号：89

期号：1-4

页面范围：371-375

ISSN号：0268-3768

关键字：Hydrogen treatment; Ti-6Al-4V; Machining

摘要：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.