Integration of Process Mechanics and Materials Mechanics for Precision Machining

Abstract:

On process mechanics, the mechanical and thermal stresses and their distributions within the material as imposed by machining is essential, and on materials mechanics, the crystal plasticity and microstructural dynamics of recrystallization, texture evolution, phase field variation, as well as constitutive of flow stress and other properties play pivotal roles. Furthermore, mechanical, thermal, and even chemical stresses imposed by machining effect the evolution of part microstructure and bulk properties, but on the other hand the materials microstructure can also change the flow stress characteristics and heat generation mechanics of machining. This process-materials interaction of bilateral nature is not clearly understood in the current literature. This paper outlines an iterative blending scheme to factor in both the process mechanics and materials mechanics in one analysis platform to facilitate the predictive modeling and planning of precision machining. The integration of the two mechanics domains combines macroscopic analysis of contact plasticity and moving heat source with the microscopic analysis of constitutive and homogenization modeling, to achieve a holistic descript of precision machining thus supporting process design and optimization. Steels, and titanium alloys are discussed as example material families in machining.

• Periodical: Solid State Phenomena (Volume 261)
• Pages: 9-16
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.261.9
• Online since: August 2017
• Authors: Steven Y. Liang*, Zhi Peng Pan
• Keywords: Inconel 718, Machining, Microstructure, Modeling, Titanium

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