Microstructural impact on flank wear during turning of various Ti-6Al-4V alloys

Dinh Nguyen, Di Kang, Thomas Bieler, Kyunghee Park, Patrick Kwon

    Research output: Contribution to journalArticle

    Abstract

    Titanium alloys typically do not contain hard inclusion phases typically observed in other metallic alloys. However, the characteristic scoring marks and more distinctive micro- and/or macro-chippings are ubiquitously observed on the flank faces of cutting tools in machining titanium alloys, which is the direct evidence of abrasive wear (hard phase(s) in the microstructure abrading and damaging the flank surface). Thus, an important question lies with the nature of the hard phases present in the titanium microstructure. In this work, we present a comprehensive study that examines the microstructural impact on flank wear attained by turning various Ti-6Al-4V bars having distinct microstructures with uncoated carbide inserts. In particular, four samples with elongated, mill-annealed, solution treated & annealed and fully-lamellar microstructures were selected for our turning experiments. After turning each sample, the flank surface of each insert was observed with confocal laser scanning microscopy (CLSM) and analyzed to determine the flank wear behavior in relation to each sample' distinct microstructures. To characterize the microstructure, scanning electron microscopy (SEM) together with Orientation imaging microstructure (OIM) was used to identify and distinguish the phases present in each sample and the content and topography of each phase was correlated to the behavior of flank wear. The flank wear is also affected by the interface conditions such as temperature and pressure, which were estimated using finite element analysis (FEA) models. The temperature dependent abrasion models enable us to estimate the flank wear rate for each microstructure, and are compared with the experimentally measured wear data.

    Original languageEnglish (US)
    Pages (from-to)72-83
    Number of pages12
    JournalWear
    Volume384-385
    DOIs
    StatePublished - 2017

    Profile

    Microstructure
    microstructure
    Cholecystectomy
    Edema Disease of Swine
    Acetanilides
    Ocular Accommodation
    Anthralin
    Titanium alloys
    titanium alloys
    inserts
    temperature
    Abrasion
    Temperature
    Common Bile Duct Diseases
    DNA Mutational Analysis
    Erysipeloid
    Adenofibroma
    Biophysics
    Abdominal Injuries
    Biogenic Amines

    ASJC Scopus subject areas

    • Condensed Matter Physics
    • Mechanics of Materials
    • Surfaces and Interfaces
    • Surfaces, Coatings and Films
    • Materials Chemistry

    Cite this

    Microstructural impact on flank wear during turning of various Ti-6Al-4V alloys. / Nguyen, Dinh; Kang, Di; Bieler, Thomas; Park, Kyunghee; Kwon, Patrick.

    In: Wear, Vol. 384-385, 2017, p. 72-83.

    Research output: Contribution to journalArticle

    Nguyen, Dinh; Kang, Di; Bieler, Thomas; Park, Kyunghee; Kwon, Patrick / Microstructural impact on flank wear during turning of various Ti-6Al-4V alloys.

    In: Wear, Vol. 384-385, 2017, p. 72-83.

    Research output: Contribution to journalArticle

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