Heat assisted machining of superalloys
[ X ]
Tarih
2021
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Altınbaş Üniversitesi / Lisansüstü Eğitim Enstitüsü
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Superalloys are vastly used in the aerospace industry due to their alluring properties such as
maintaining their strength at high-temperature applications. Nevertheless, manufacturing these
raw materials to the desired geometrical shapes is one of the main challenges of the subtractive
manufacturing industry and they are categorized as hard-to-machine materials. Several approaches
such as High-Speed Machining (HSM), Cryogenic cooling, Minimum Quantity Lubrication
(MQL), and Heat Assisted Machining (HAM) are introduced to tackle this matter.
HAM is a technique that introduces external heat sources to the workpiece (pre-heating or realtime heating methods) to increase the ductility of the superalloy and therefore reduce the yield and
shear strength of the workpiece. By this means the machining parameters demonstrate an
improvement compared to conventional machining.
This study focuses on the research approaches conducted to evaluate the effect of the various heat
source applications (Gas flame, Induction, Laser, and Plasma) on the material properties and the
machinability of the superalloys. Additionally, the heating methodology and heat assistance impact
on cutting parameters (forces, tool life, surface integrity, and chip morphology) are outlined.
Finally, a comparison of the heat source efficiency and the economics of the various heat
applications are performed. The analysis of the Finite element method on the orthogonal cutting
of Inconel 718 was evaluated. The material behavior can observe by the constitutive model, the effect of high strain, strain rate, and temperatures on the equivalent flow stresses observed by the
modeling of conventional and modified Jhonson-cook. The induction heat source considered and
the analytical solution of induction power is evaluated. the heat-induced in the Inconel 718
workpiece concerning time is studied in detail. The induction heating of Inconel 718 is simulated
by using the COMSOL multiphysics model. The effect of frequency and current on the temperature
inside the material has been discussed. A comparison of the stress-strain curve of the Inconel 718
modeled, the temperature effect on the strain rate
Açıklama
Anahtar Kelimeler
Superalloys, Heat Assisted Machining, Laser, Induction, Flow Stresses, Finite Element Analysis
Kaynak
WoS Q Değeri
Scopus Q Değeri
Cilt
Sayı
Künye
Munir, Talha. (2021). Heat assisted machining of superalloys. (Yayınlanmamış yüksek lisans tezi). Altınbaş Üniversitesi, Lisansüstü Eğitim Enstitüsü, İstanbul.
