Investigation of Brinell Indentation Diameter From Confocal Microscope Measurement and FEA Modeling
Li Ma, Samuel Low, J J. Song
Significant measurement differences have been continually observed worldwide in the Brinell hardness tests, even in the secondary calibration laboratories that calibrate test block reference standards. The main cause of this problem is due to the edge of the indentation that is not a distinct boundary, but is instead a curved surface with either material pile-up or sink-in, due to the plastic flow of the material surrounding the ball indenter. This makes a clear determination of the measured indentation diameter difficult. In this research, Brinell hardness indentations were made using various test forces and indenter ball sizes. Using a confocal microscope at the National Institute of Standards and Technology's surface and microform calibration laboratory, the indentations were measured in three dimensions, from which the indentation profiles were determined Additionally, finite element analysis (FEA) models were developed for investigating the indentation contact diameter for indentation impressions with pile-up edges, depending on indentation force and ball indenter force-diameter ration. From both microscope measurements and FEA simulations, deviation of measured indentation diameter from the real contact diameter was accurately determined for each indentation.
Proceedings of Hardiness Measurements Theory and Application in Laboratories and Industries| 2007 |HARDMEKO
November 19-21, 2007
Tsukuba, 1, JA
HARDMEKO Hardiness Measurements Theory and Application in Laboratories and Industries
B rinell hardness, finite element analysis (FEA) modeling, pile-up
, Low, S.
and Song, J.
Investigation of Brinell Indentation Diameter From Confocal Microscope Measurement and FEA Modeling, Proceedings of Hardiness Measurements Theory and Application in Laboratories and Industries| 2007 |HARDMEKO, Tsukuba, 1, JA
(Accessed June 4, 2023)