Book ChapterDOI
Evaluation of Mechanical Properties of Nano-structured Al6061 Synthesized Using Machining
Paresh S. Ghangrekar,H. Murthy,Balkrishna C. Rao +2 more
- Vol. 6, pp 111-118
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TLDR
In this article, the synthesis of nano-structured Al6061 using machining under plane strain and evaluation of its mechanical properties is discussed, which is in agreement with results reported in existing literature.Abstract:
This work focuses on the synthesis of nano-structured Al6061 using machining under plane strain and evaluation of its mechanical properties. It discusses an unusual application of the machining process by using it as a severe plastic deformation (SPD) process to develop nano-structured or ultra-fine grained materials. Chips obtained from this process show higher hardness than the bulk material which is in agreement with results reported in existing literature. Chips with minimum curvature have been obtained using restricted contact tool and extrusion-machining processes. Hardness of the straight chips obtained by the stated methods, though higher than the bulk material, was less than the hardness of the curled chips obtained from conventional orthogonal machining. Furthermore, hardness of the chips obtained using tool with restricted contact length of 0.6mm showed lesser variation. Hence they were used to prepare samples for the tensile test. A novel method was used to prepare small test specimens from chips to measure tensile strength. Specimens made from the chips had higher ultimate tensile strength (53%) and yield strength (85%) than that of bulk material. Improvement in strength was accompanied by a reduction in ductility (58%) for chips as compared to bulk material. It was observed that for both the chip and the bulk material, the reduction in gauge length leads to lower values of Young s modulus showing size effect.read more
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Journal ArticleDOI
Gage length and sample size effect on measured properties during tensile testing
TL;DR: In this paper, an analysis of the mechanical behavior of well-known Ti-6Al-4V alloy at different length scales is presented and the results are compared to that of metallic glasses at the same scale and the general trends are highlighted.
Journal ArticleDOI
The Tool Restricted Contact Effect as a Major Influencing Factor in Chip Breaking: An Experimental Analysis
I.S. Jawahir,P.L.B. Oxley +1 more
TL;DR: In this article, the performance of six commercially available chip forming tool inserts has been assessed and the tool restricted contact effect determining the chip streaming (i.e. chip backflow) has been found to be a major influencing factor in chip breaking.
Journal ArticleDOI
Severe plastic deformation (SPD) and nanostructured materials by machining
Srinivasan Swaminathan,M. Ravi Shankar,Balkrishna C. Rao,W. Dale Compton,Srinivasan Chandrasekar,Alexander H. King,Kevin P. Trumble +6 more
TL;DR: In this article, it is shown that a switch-over from an elongated subgrain microstructure to an equi-axed nanocrystalline micro-structure, with a preponderance of large-angle grain boundaries, has been demonstrated at the higher levels of strain in several of these materials.
Journal ArticleDOI
Chip curl and the action of the groove type chip former
B. Worthington,A.H. Redford +1 more
TL;DR: In this paper, the authors examined the mechanism of chip curl and on the performance of obstruction and groove type chip formers and proposed new explanations of chip curls and the action of the groove type former.
Journal ArticleDOI
Electrically Assisted Aerosol Reactors using Ring Electrodes
TL;DR: In this article, axial electrical fields were applied on a silica producing flame using hexamethyldisiloxane (HMDS) as a precursor, and experiments varying the precursor delivery rate corresponding to total production rates of 10, 20 and 30 g/h.
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