Flow Stress Model for Titanium Alloy Ti-6AI-4V in Machining Operations

Hdl Handle:
http://hdl.handle.net/11285/572498
Title:
Flow Stress Model for Titanium Alloy Ti-6AI-4V in Machining Operations
Issue Date:
01/05/2009
Abstract:
Machining of titanium alloys is widely used in high-value added industries such as aerospace and medical devices. In this research, an extensive literature review was conducted on experimental and simulation investigations of Ti-6Al-4V machining. Using the findings of the review and applying a novel experimental technique (slot- milling test), an approach to determine the flow stress behavior for the Finite Element Modeling (FEM) of titanium machining was developed and implemented. An evaluation of the proposed model in this study is addressed using experimental data from literature and from slot-milling tests conducted during this research. The proposed flow stress model for Ti-6Al-4V shows good prediction capabilities in regards to chip morphology and cutting forces. The typical serrated chip found in titanium machining is reproduced in this research through FEM simulation and without the need of a damage criterion. This phenomenon can be reproduced through adiabatic softening captured by the developed constitutive model. The proposed flow stress model is based on a Johnson-Cook formulation and modified to use only 4 calibration parameters. Based on these results, FEM simulation is an effective tool for modeling of titanium (Ti-6Al-4V) machining, in order to minimize the use of costly experimentation. The applicability of the multi-scale modeling approach is also shown in this research. Dynamic stability of machining operations and FEM simulations are linked through a non-linear cutting force model. This research shows how FEM simulation in titanium alloys can be applied to generate the parameters of the non-linear cutting force model.
Keywords:
Titanio; Compresión; Coeficiente; Técnicas
Degree Program:
Programa de Graduados en Ingeniería
Advisors:
Dr. Ciro ángel Rodríguez González
Committee Member / Sinodal:
Dr. Alex Elías ZÚñiga; Dr. Horacio Ahuett Garza; Dr. Nicolás Hendrichs Troeglen
Degree Level:
Doctor en Ciencias de Ingeniería
School:
Escuela de Ingeniería
Campus Program:
Campus Monterrey
Discipline:
Ingeniería y Ciencias Aplicadas / Engineering & Applied Sciences
Appears in Collections:
Ciencias Exactas

Full metadata record

DC FieldValue Language
dc.contributor.advisorDr. Ciro ángel Rodríguez Gonzálezes
dc.creatorMartínez López, Alejandroen
dc.date.accessioned2015-08-17T11:33:47Zen
dc.date.available2015-08-17T11:33:47Zen
dc.date.issued01/05/2009-
dc.identifier.urihttp://hdl.handle.net/11285/572498en
dc.description.abstractMachining of titanium alloys is widely used in high-value added industries such as aerospace and medical devices. In this research, an extensive literature review was conducted on experimental and simulation investigations of Ti-6Al-4V machining. Using the findings of the review and applying a novel experimental technique (slot- milling test), an approach to determine the flow stress behavior for the Finite Element Modeling (FEM) of titanium machining was developed and implemented. An evaluation of the proposed model in this study is addressed using experimental data from literature and from slot-milling tests conducted during this research. The proposed flow stress model for Ti-6Al-4V shows good prediction capabilities in regards to chip morphology and cutting forces. The typical serrated chip found in titanium machining is reproduced in this research through FEM simulation and without the need of a damage criterion. This phenomenon can be reproduced through adiabatic softening captured by the developed constitutive model. The proposed flow stress model is based on a Johnson-Cook formulation and modified to use only 4 calibration parameters. Based on these results, FEM simulation is an effective tool for modeling of titanium (Ti-6Al-4V) machining, in order to minimize the use of costly experimentation. The applicability of the multi-scale modeling approach is also shown in this research. Dynamic stability of machining operations and FEM simulations are linked through a non-linear cutting force model. This research shows how FEM simulation in titanium alloys can be applied to generate the parameters of the non-linear cutting force model.en
dc.language.isoesen
dc.rightsOpen Accessen
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.titleFlow Stress Model for Titanium Alloy Ti-6AI-4V in Machining Operationsen
dc.typeTesis de Doctoradoes
thesis.degree.grantorInstituto Tecnológico y de Estudios Superiores de Monterreyes
thesis.degree.levelDoctor en Ciencias de Ingenieríaes
dc.contributor.committeememberDr. Alex Elías ZÚñigaes
dc.contributor.committeememberDr. Horacio Ahuett Garzaes
dc.contributor.committeememberDr. Nicolás Hendrichs Troeglenes
thesis.degree.disciplineEscuela de Ingenieríaes
thesis.degree.namePrograma de Graduados en Ingenieríaes
dc.subject.keywordTitanioes
dc.subject.keywordCompresiónes
dc.subject.keywordCoeficientees
dc.subject.keywordTécnicases
thesis.degree.programCampus Monterreyes
dc.subject.disciplineIngeniería y Ciencias Aplicadas / Engineering & Applied Scienceses
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