Numerical simulation of stress relieving of an austenite stainless steel

Urevc, Janez (author), Koc, Pino (author), Štok, Boris (author)

An approach to numerical simulation of the annealing process with stress relieving is presented in the paper. For austenite stainless steel 316L (AISI), which exhibits no phase transformation from the melting point to room temperature, a viscous-elastic-plastic constitutive model is elaborated. First, from given experimental data the respective mechanical material parameters as a function of temperature are numerically identified by an inverse procedure. Then, the adequacy of the adopted model and identified material parameters is proven by a numerical simulation of stress relieving in two technological cases: (i) two-stage deep drawing with intermediate stress annealing and, (ii) simplified welding process followed by post weld heat treatment. In both cases the obtained residual stress state reduction is found to be in good agreement with the empirical experience and data provided from literature.

• Language: English
• Keywords: mechanical properties, modelling and process simulation, stress relieving, viscouselastic- plastic constitutive model, stainless steel
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FS - Faculty of Mechanical Engineering
• Publication status: Published
• Publication version: Version of Record
• Year: 2009
• Number of pages: Str. 590-598
• Numbering: Vol. 55, no. 10
• PID: 20.500.12556/RUL-160833-60591caa-8589-69f7-6693-f2f11c028362
• UDC: 669.14.018.8
• ISSN on article: 0039-2480
• COBISS.SI-ID: 11207707
• Publication date in RUL: 05.09.2024

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.

Secondary language

• Language: Slovenian
• Title: Numerično simuliranje žarjenja za odpravo zaostalih napetosti avstenitnega nerjavnega jekla

Abstract

V delu je predstavljen pristop k numeričnim simulacijam žarjenja za odpravljanje zaostalih napetosti. Obravnavano je avstenitno nerjavno jeklo 316L (AISI) s popolnoma avstenitno strukturo v celotnem temperaturnem razponu od sobne temperature do temperature okolice. Jeklo, zaradi povišanih temperatur, obravnavamo kot visko-elasto-plastično. Mehanske lastnosti jekla in njihove temperaturne odvisnosti so za izbran visko-elasto-plastičen konstitutivni model identificirane s pomočje inverzne identifikacije na osnovi eksperimentalnih podatkov. Ustreznost izbranega materialnega modela ter identificiranih snovnih lastnosti je prikazana na primeru numerične simulacije žarjenja za odpravljanje zaostalih napetosti na primeru dveh, v praksi široko uporabljenih tehnoloških procesih: (i) globokem vleku z vmesnim žarjenjem za odpravljanje zaostalih napetosti ter (ii) žarjenju za odpravljanje varilnih napetosti v primeru poenostavljenega procesa varjenja. Velikost odpravljenih zaostalih napetosti je v obeh obravnavanih primerih v dobrem soglasju z empiričnimi izkušnjami ter podatki iz literature.

• Keywords: mehanske lastnosti, modeliranje procesov, simulacija procesov, elasto-plastičen konstitutivni model, odpravljanje napetosti