Determination of Limiting Dome Height (LDH) values for Inconel 718 alloy sheet using FEA and hemispherical punch method

Ganesan, Kanmani (author), Sambasivam, Saravanan (author), Ramadass, Rajesh (author)

In this work, initially the chemical composition of Inconel 718 alloy sheet was obtained using X-ray fluorescence technique (XRF). The material properties such as yield strength, ultimate tensile strength, percentage of elongation, normal anisotropy, planar anisotropy, strain hardening exponent, and the strength coefficient were determined in longitudinal, diagonal, and transverse rolling direction using a uniaxial tensile test. The Limiting Dome Height (LDH) values are obtained by simulation and experimentation based on the hemispherical punch method. In simulation work, Barlat-89 yield criterion was used to obtain the Limiting Dome Height (LDH) values and strain distribution along with the specimen in Abaqus 6.1 software. The experimental LDH values of Inconel 718 alloy sheet and simulated results obtained from Abaqus 6.1 software were in close agreement. The approach presented in this work can be applied to obtain the LDH test values of interesting material focused by researchers. With the help of experiments, a limit curve was established which ensures the safe working region of Inconel 718 sheet. Scanning Electron Microscope (SEM) analysis of 100 &120 mm width specimens indicated smooth surface and ductile fracture. The examination of 140 &160 mm width specimens showed rough surface and shear-ductile failure. Energy Dispersive Spectrum (EDS) analysis of a fractured surface confirms the constituents of the sheet present before failure.

• Language: English
• Keywords: sheet, Inconel 718, uniaxial tensile tests, hemispherical punch method, LDH values, SEM, EDS
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FS - Faculty of Mechanical Engineering
• Publication status: Published
• Publication version: Version of Record
• Publication date: 23.05.2022
• Year: 2022
• Number of pages: 10 str.
• Numbering: Vol. 68, no. 6
• PID: 20.500.12556/RUL-138122
• UDC: 620.172.254
• ISSN on article: 0039-2480
• DOI: 10.5545/sv-jme.2022.98
• COBISS.SI-ID: 114909443
• Publication date in RUL: 11.07.2022

Record is a part of a journal

• Title: Strojniški vestnik
• Shortened title: Stroj. vestn.
• Publisher: Zveza strojnih inženirjev in tehnikov Slovenije [etc.], = Association of Mechanical Engineers and Technicians of Slovenia [etc.
• ISSN: 0039-2480
• COBISS.SI-ID: 762116

Licences

• License: CC BY 4.0, Creative Commons Attribution 4.0 International
• Link: http://creativecommons.org/licenses/by/4.0/
• Description: This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.
• Licensing start date: 23.05.2022

Secondary language

• Language: Slovenian
• Title: Določitev vrednosti mejne višine polkrogle (LDH) za pločevino iz zlitine Inconel 718 po metodi polokroglega pestiča z eksperimenti in z analizo po metodi končnih elementov
• Keywords: pločevina, Inconel 718, natezni preizkusi, metoda polokroglega pestiča, metoda končnih elementov, LDH, elektronski mikroskopi, energijsko disperzijski spektrometri