ECCI and EBSD Study of Subsurface Damages in High Speed Turning of Inconel 718 under Different Tools and Machining Parameters
Inconel 718 is a Ni-based superalloy that can perform excellently at elevated temperatures.However,surface and subsurface damages in the form of microstructural and property changes and tensile residual stresses are common in a machined Inconel 718 component because of its poor machinability.Such damages have a significant influence on performance and the life time of the part.To characterise microstructural damages and understand how they are correlated to machining conditions are not only important for the evaluation of surface integrity but also for the optimization of machining operations to minimise effects from the machining process.This paper uses the ECCI (electron channelling contrast imaging) and EBSD (electron back scatter diffraction) methods to study the effect of cutting tools and cutting speeds on subsurface plastic deformation of machined Inconel 718.When turning at 200 m/min,a comparable level of plastic deformation was found under the surface machined with uncoated cubic boron nitride (CBN),titanium nitride coated CBN and whisker reinforced alumina (WRA).With an increase in cutting speed,the plastic deformation depth increased,and uncoated CBN tools showed superior performance in term of subsurface microstructure alterations compared to the other tool materials.
Inconel 718 High speed turning Surface integrity Plastic deformation EBSD
Zhe Chen Ru Lin Peng Jinming Zhou Johan Moverare Volodymyr Bushlya Sten Johansson
Division of Engineering Materials,Link(o)ping University,58183 Link(o)ping,Sweden Division of Production and Materials Engineering,Lund University,22100 Lund,Sweden
国际会议
北京
英文
1-8
2013-06-16（万方平台首次上网日期，不代表论文的发表时间）