You are being redirected because this document is part of your ASTM Compass® subscription.
    This document is part of your ASTM Compass® subscription.

    Volume 46, Issue 6 (March 2018)

    Relationship Between Machinability, Microstructure, and Mechanical Properties of Al-7Si Alloy

    (Received 8 February 2017; accepted 20 June 2017)

    Published Online: 13 March 2018

    CODEN: JTEVAB

      Format Pages Price  
    PDF (1.78 MB) 12 $25   ADD TO CART

    Cite this document

    X Add email address send
    X
      .RIS For RefWorks, EndNote, ProCite, Reference Manager, Zoteo, and many others.   .DOCX For Microsoft Word



    Abstract

    In this work, commercially available Al-7Si alloy was used, and the microstructure was modified by the additions of AlSr15, AlTi5B1, and Al3B. Cylindrical samples were cast into a sand mold and the machinability of the alloys was characterized by means of surface roughness, chip morphology, and buildup edge of the chips. Tool life and surface finish can be improved by decreased chip size by lowering the energy required for machining. The surface finish is an indicator of the quality of the material during the machining process. Therefore, in addition, melt quality was measured by means of reduced pressure test and the calculation of the bifilm index was used to compare the melt quality with machinability. It was found that there is a good correlation between bifilm index and surface roughness of the machined parts. Thus, for a better surface finish, melt quality, which can be quantified by bifilm index, has to be high. AlSr15 modified alloy exhibits the lowest built-up edge with the lowest surface roughness, because strontium modification causes coarse silicon crystals to transform to fine fibrous structure, which enhances machinability.

    Author Information:

    Uludağ, Muhammet
    Metallurgical and Materials Engineering, Bursa Technical University, Faculty of Natural Sciences, Architecture and Engineering, Bursa,

    Yazman, Şakir
    Machine Selcuk University, Ilgın Technical Science College, Konya,

    Gemi, Lokman
    Necmettin Erbakan University, Seydisehir Technical Science College, Konya,

    Bakircioğlu, Barış
    Machine Selcuk University, Ilgın Technical Science College, Konya,

    Erzi, Eray
    Metallurgical and Materials Engineering, Istanbul University, Engineering Faculty, Istanbul,

    Dispinar, Derya
    Metallurgical and Materials Engineering, Istanbul University, Engineering Faculty, Istanbul,


    Stock #: JTE20170083

    ISSN:0090-3973

    DOI: 10.1520/JTE20170083

    Author
    Title Relationship Between Machinability, Microstructure, and Mechanical Properties of Al-7Si Alloy
    Symposium ,
    Committee B07