Journal
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume 618, Issue -, Pages 71-85Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2014.08.076
Keywords
Titanium alloys; beta phase fraction; Shear bands; Grain deformation; Machining affected zone
Categories
Funding
- National Centre for Aerospace Innovation and Research
- Dept. of Science and Technology-Government of India
- Boeing Company
- IIT Bombay
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In machining of titanium alloys, beta phase fraction influences their temperature stability and consequently the material deformation in and around shear bands in chips. To understand the influence, chips and chip roots generated during orthogonal machining of these titanium alloys with increasing beta phase fraction viz, alpha, alpha+beta, beta rich alpha+beta alloys were collected. Analysis of shear band characteristics and micro-mechanism of deformation of the material during machining shows that an increase in beta phase fraction limits the spread of material deformation around the shear bands, reduces the spacing between them and prevents recovery micro-mechanism. Larger depth of machining affected zone in case of a and alpha+beta alloy as compared to beta rich alloy is attributed to their coarse grain size. (C) 2014 Elsevier B.V. All rights reserved.
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