Effect of Grain Orientation on Scratch Testing

5 Pages Posted: 12 Feb 2018

See all articles by Mohit Kothari

Mohit Kothari

Veermata Jeejabai Technological Institute

Yogesh Gaikhe

Indian Institute of Technology (IIT), Bombay - Mechanical Department, Students

Taha Khot

Veermata Jijabai Technological Institute (VJTI)

A.S. Rao

Veermata Jijabai Technological Institute (VJTI)

Asim Tewari

Indian Institute of Technology (IIT), Bombay

Date Written: December 21, 2017

Abstract

Machining is complex, high strain-rate and high strain deformation/fracture process. It is also a strong function of the crystal structure of the work piece and its orientation with respect to cutting direction. The effect of crystallographic orientation on cutting forces for single crystal material has been studied by many researchers in the past. However, a study of the same in polycrystal grains and effect of grain boundary (GB) is limited. Hence this work focuses on the effect of grain orientation on forces during scratch experiments on commercially pure aluminum. Heat treatment cycles were applied to grow coarse grains (100-500 um) in the aluminum alloy. The crystallographic structure was determined by Electron Backscatter Diffraction and was used as a basis for scratch experiments. The forces required to perform scratch were measured for different grain orientations and grain boundaries. The measured forces were rationalized based on the underlining grain crystallography and scratch direction.

Keywords: Cutting Force, Grain, Grain Boundary, Orientation

Suggested Citation

Kothari, Mohit and Gaikhe, Yogesh and Khot, Taha and Rao, A.S. and Tewari, Asim, Effect of Grain Orientation on Scratch Testing (December 21, 2017). International Conference on Advances in Thermal Systems, Materials and Design Engineering (ATSMDE2017), Available at SSRN: https://ssrn.com/abstract=3101693 or http://dx.doi.org/10.2139/ssrn.3101693

Mohit Kothari (Contact Author)

Veermata Jeejabai Technological Institute ( email )

Matunga, Mumbai, Maharashtra
India

Yogesh Gaikhe

Indian Institute of Technology (IIT), Bombay - Mechanical Department, Students ( email )

Mumbai
India

Taha Khot

Veermata Jijabai Technological Institute (VJTI)

Matunga, Mumbai, Maharashtra
India

A.S. Rao

Veermata Jijabai Technological Institute (VJTI) ( email )

Matunga, Mumbai, Maharashtra
India

Asim Tewari

Indian Institute of Technology (IIT), Bombay

Powai
IIT Bombay, Powai
Mumbai, Maharashtra 400076
India

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