Loughborough University
Browse
US 2017 Microstructural evolution for LUPIN.pdf (9.72 MB)

Microstructural evolution of Ti6Al4V in ultrasonically assisted cutting: numerical modelling and experimental analysis

Download (9.72 MB)
journal contribution
posted on 2017-06-30, 11:00 authored by Wei Bai, Ronglei Sun, Jurgen Leopold, Vadim SilberschmidtVadim Silberschmidt
This paper aims to elucidate the effect of ultrasonically assisted cutting (UAC) on microstructure in a machined surface and a chip of Ti6Al4V alloy. To investigate microstructural evolution, a FE-based cutting model with an enhanced material formulation and temperature dependent material properties was developed. A Johnson-Mehl-Avrami-Kolmogorov (JMAK) model for the Ti6Al4V alloy was employed to simulate dynamic recrystallization and predict a resultant grain size. Due to a specific thermomechanical load in UAC, the distributions of strains, strain rates and temperatures in a workpiece in the machining process were investigated. In this study, five points under the machined surface and ten points under the unmachined one were tracked to compare the evolution of a grain size and its average magnitude in the alloy subjected to conventional cutting (CC) and UAC. Besides of numerical modelling and experimental studies for the resultant grain size were compared and additional validation using microhardness measurements were conducted. The results showed that the average grain size of the machined surface and the chip in case of UAC was larger and more uniform than that in case of CC. The study also presents discussions about the effect of a vibration amplitude, a feed rate and a cutting speed on the average grain size in machining of Ti6Al4V. The comparison between CC and UAC indicates that the change in average grain size in UAC was smaller than that in CC, thus demonstrating a lower level of damage in UAC.

Funding

This work was supported by the National Basic Research Program of China (973 Program) grant No. 2013CB035805.

History

School

  • Mechanical, Electrical and Manufacturing Engineering

Published in

Ultrasonics

Volume

78

Pages

70 - 82

Citation

BAI, W. ... et al., 2017. Microstructural evolution of Ti6Al4V in ultrasonically assisted cutting: numerical modelling and experimental analysis. Ultrasonics, 78, pp.70-82.

Publisher

© Elsevier

Version

  • AM (Accepted Manuscript)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/

Acceptance date

2017-03-08

Publication date

2017-03-09

Copyright date

2017

Notes

This paper was published in the journal Ultrasonics and the definitive published version is available at http://dx.doi.org/10.1016/j.ultras.2017.03.005.

ISSN

0041-624X

Language

  • en

Usage metrics

    Loughborough Publications

    Exports

    RefWorks
    BibTeX
    Ref. manager
    Endnote
    DataCite
    NLM
    DC