A material softening model based on thermal activation energy has been successfully established through tempering experiments in the first part of this study. To apply the model to predicting material softening in hard turned surfaces, the thermal history of work material is needed. In this part, a three-dimensional finite element (FE) model of machining hardened 52100 steel is constructed, and coupled thermal-stress analysis is performed to obtain the material thermal history. Then the material softening model uses the computed thermal history as input to predict the material hardness profiles along the depth into the machined surfaces. Overall, the prediction precisely catches the trend of hardness change along depth and agrees reasonably well with the hardness measurement. What’s more, the sensitivity of material softening to cutting parameters is investigated both quantitatively and qualitatively. Within the investigation range, it is observed that the increase of tool flank wear and feed rate produces severe material softening and a deeper softened layer, while the increase of cutting speed causes significant softening to the surface material but hardly changes the softened depth.
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e-mail: jing.shi@ndsu.nodak.edu
e-mail: liuch@ecn.purdue.edu
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August 2005
Technical Papers
On Predicting Softening Effects in Hard Turned Surfaces—Part II: Finite Element Modeling and Verification
Jing Shi,
Jing Shi
Department of Industrial and Manufacturing Engineering,
e-mail: jing.shi@ndsu.nodak.edu
North Dakota State University
, Fargo, ND 58105
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C. Richard Liu
C. Richard Liu
School of Industrial Engineering,
e-mail: liuch@ecn.purdue.edu
Purdue University
, West Lafayette, IN 47907
Search for other works by this author on:
Jing Shi
Department of Industrial and Manufacturing Engineering,
North Dakota State University
, Fargo, ND 58105e-mail: jing.shi@ndsu.nodak.edu
C. Richard Liu
School of Industrial Engineering,
Purdue University
, West Lafayette, IN 47907e-mail: liuch@ecn.purdue.edu
J. Manuf. Sci. Eng. Aug 2005, 127(3): 484-491 (8 pages)
Published Online: December 20, 2004
Article history
Received:
August 19, 2003
Revised:
December 20, 2004
Connected Content
A companion article has been published:
On Predicting Softening Effects in Hard Turned Surfaces—Part I: Construction of Material Softening Model
Citation
Shi, J., and Liu, C. R. (December 20, 2004). "On Predicting Softening Effects in Hard Turned Surfaces—Part II: Finite Element Modeling and Verification." ASME. J. Manuf. Sci. Eng. August 2005; 127(3): 484–491. https://doi.org/10.1115/1.1948402
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