Simulation of Rolling and Recrystallization Textures in Aluminium Alloy Sheets

2007 ◽  
Vol 550 ◽  
pp. 23-34 ◽  
Author(s):  
Olaf Engler
Keyword(s):  
Process Development ◽  
Process Models ◽  
Mechanical Processing ◽  
Materials Properties ◽  
Hot Strip ◽  
Polycrystal Plasticity ◽  
Recent Developments ◽  
Computer Based ◽  
Evolution Of Microstructure ◽  
The Impact

Computer-based alloy and process development requires integration of models for simulating the evolution of microstructure, microchemistry and crystallographic texture into process models of the thermo-mechanical production of Al sheet. The present paper focuses on recent developments in linking softening modules that simulate the progress of recovery and recrystallization with the following texture changes to deformation and microchemistry models. The potential of such coupled simulations is illustrated by way of the thermo-mechanical processing of Al-Mn-Mg AA 3104 can stock. In particular, the impact of inter-stand recrystallization between the tandem hot rolling passes as well as recrystallization during coil cooling (“self-annealing”) on the resulting hot strip and final gauge textures are explored. Finally, the predicted textures are input into a polycrystal-plasticity approach to simulate anisotropic properties (earing behaviour) of the sheets. Thus, it is possible to link the materials properties at final gauge to the decisive steps of deformation and recrystallization along the thermo-mechanical process chain.

Modelling of Recrystallisation Kinetics and Texture during the Thermo-Mechanical Processing of Aluminium Sheets

2005 ◽  
Vol 495-497 ◽  
pp. 555-566 ◽  
Author(s):  
Olaf Engler ◽  
L. Löchte ◽  
Kai F. Karhausen
Keyword(s):  
Crystallographic Texture ◽  
Rolling Mill ◽  
High Speed ◽  
Process Development ◽  
Process Models ◽  
Mechanical Processing ◽  
Recent Developments ◽  
Computer Based ◽  
Aluminium Sheets ◽  
Evolution Of Microstructure

Computer-based alloy and process development requires integration of models for simulating the evolution of microstructure, microchemistry and crystallographic texture into process models of the thermo-mechanical production of Al sheet. The present paper focuses on recent developments in linking softening modules that simulate the progress of recovery and recrystallisation with the following texture changes to deformation and microchemistry models. The potential of such coupled simulations is illustrated by way of the thermo-mechanical processing of Al-Mg-Mn alloys. In particular, the progress of recrystallisation during coil cooling (“self-annealing”) as well as the texture differences between production on a reversible rolling mill and a high-speed tandem line are explored.

Simulation of Recrystallization and Recrystallization Textures in Aluminium Alloys

2012 ◽  
Vol 715-716 ◽  
pp. 399-406
Author(s):  
Olaf Engler
Keyword(s):  
Crystallographic Texture ◽  
Process Development ◽  
Plastic Anisotropy ◽  
Process Models ◽  
Detailed Knowledge ◽  
Recent Developments ◽  
History Of ◽  
Computer Based ◽  
Strain Paths ◽  
Evolution Of Microstructure

The control of the plastic anisotropy during forming of a metallic sheet requires detailed knowledge on its microstructure and, especially, crystallographic texture. During the thermo-mechanical processing of aluminium sheet products in commercial production lines the material experiences a complex history of temperature, time and strain paths, which result in alternating cycles of deformation and recrystallization with the associated changes in texture and microstructure. Thus, computer-based alloy and process development requires integration of models for simulating the evolution of microstructure, microchemistry and crystallographic texture into process models of the thermo-mechanical production of Al sheet. The present study focuses on recent developments in linking softening modules that simulate the progress of recovery and recrystallization with the following texture changes to deformation and microchemistry models.

On the Impact of Thermo-Mechanical Processing on Texture and the Resultant Anisotropy of Aluminium Sheet

2011 ◽  
Vol 702-703 ◽  
pp. 427-434
Author(s):  
Olaf Engler
Keyword(s):  
Crystallographic Texture ◽  
Process Development ◽  
Texture Evolution ◽  
Process Models ◽  
Mechanical Processing ◽  
Aluminium Sheet ◽  
Strain Paths ◽  
Sheet Products ◽  
Plant Trials ◽  
The Impact

During the thermo-mechanical processing of aluminium sheet products in commercial production lines the material experiences a complex history of temperature, time and strain paths, which result in alternating cycles of deformation and recrystallization with the associated changes in microstructure and, especially, crystallographic texture. Thus, computer-based alloy and process development requires integration of models for simulat¬ing the evolution of microstructure, microchemistry and crystallographic texture into process models of the thermo-mechanical production of Al sheet. In the present paper the influence of texture on the anisotropic properties is explored for various industrially processed aluminium alloy sheets for packaging applications. Besides the use of experimentally measured sheet textures as an input for the anisotropy calculations, particular attention is given to the use of modelled textures. Here, results from a comprehensive through-process modelling of the texture evolution during the thermo-mechanical production of aluminium sheet are utilized. Eventually, this will enable us to predict the evolution of texture and the resulting properties along the entire process chain and hence to improve product quality of aluminium sheet products avoiding laborious and expensive plant trials.

Modelling of Microstructure and Texture and the Resulting Properties during the Thermo-Mechanical Processing of Aluminium Sheets

2006 ◽  
Vol 519-521 ◽  
pp. 1563-1568 ◽  
Author(s):  
Olaf Engler
Keyword(s):  
Texture Evolution ◽  
Mechanical Processing ◽  
Process Chain ◽  
Production Lines ◽  
Thermomechanical Process ◽  
Polycrystal Plasticity ◽  
History Of ◽  
Strain Paths ◽  
Aluminium Sheets ◽  
Evolution Of Microstructure

In order to predict the mechanical properties of Al sheet products, the evolution of microstructure and crystallographic texture along the process chain must be tracked. During the thermo-mechanical processing in commercial production lines the material experiences a complex history of temperature, time and strain paths, which results in alternating cycles of deformation and recrystallization with the associated changes in texture and microstructure. In the present paper the texture evolution of AA 3104 can body stock is modelled. In particular, the earing behaviour at final gauge is linked to the decisive steps of deformation and recrystallization along the thermomechanical process chain. For this purpose, the textures predicted by a comprehensive throughprocess model of the texture evolution during the thermo-mechanical production of Al sheet are input into a polycrystal-plasticity approach to simulate earing of the final gauge sheets.

Conceptualizing the supplier switching process: an example from public procurement

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Anne-Maria Holma ◽  
Anu Bask ◽  
Antti Laakso ◽  
Dan Andersson
Keyword(s):  
Process Development ◽  
Public Procurement ◽  
Process Models ◽  
Switching Process ◽  
Service Process ◽  
Content Type ◽  
Relationship Initiation ◽  
Supplier Switching ◽  
Private And Public ◽  
The Impact

Purpose This paper aims to develop a framework for switching a service supplier in a supply network. Design/methodology/approach The study builds on existing literature in the field of purchasing and supply management, public procurement (PP) and the Industrial Marketing and Purchasing approach, as well as on an illustrative example case, from the PP context, of a supplier switch in a service delivery process. Findings During a switching process, the buyer must simultaneously manage the ending of a relationship with the incumbent supplier and the beginning of a relationship with a new supplier. Collaboration with the focal suppliers to develop a service process with standardized components prevents disruptions in the service processes and reduces the impact of the switch on the wider network. Research limitations/implications The conceptualization suggested in this paper needs to be further explored in different empirical contexts to assess its practical adequacy. Practical implications Practitioners responsible for service procurement can use the findings to develop collaboration with suppliers, both when it comes to service process development and to the switching process. Furthermore, the authors highlight the importance of ending competencies and the development of an exit plan to conduct a “beautiful exit.” Originality/value The paper integrates relationship initiation and ending studies, as well as procurement process models to develop a refined switching process framework. Many PPs rely on short-term relationships due to the legal obligation to frequently invite suppliers to tender, thus understanding the supplier switching process is important both for private and public sector actors.

Effect of Natural Ageing on Strength and Anisotropy in Aluminium Alloy AA 6005C

2016 ◽  
Vol 877 ◽  
pp. 688-694 ◽  
Author(s):  
Olaf Engler ◽  
Ole Runar Myhr
Keyword(s):  
Plastic Anisotropy ◽  
Material Model ◽  
Age Hardening ◽  
Natural Ageing ◽  
Nanoscale Material ◽  
Materials Properties ◽  
Plane Anisotropy ◽  
Polycrystal Plasticity ◽  
The Impact ◽  
6Xxx Series

During processing of age-hardenable AA 6xxx series alloys for automotive applications the sheets may experience significant time spans between solution heat treatment at the aluminium supplier and age hardening upon the final paint bake cycle at the carmaker. Natural ageing during these pause times is known to greatly affect materials properties of autobody sheet. In the present study we explore the impact of natural ageing on the tensile properties and the in-plane anisotropy of alloy AA 6005C. Materials properties at various degrees of natural ageing are modelled with the help of a nanoscale material model NaMo, which consists of a precipitation model simulating the formation of clusters and phases upon natural ageing as input to a mechanical model simulating the evolution of yield strength and work hardening. Plastic anisotropy is modelled from the materials crystallographic texture by a visco-plastic self-consistent polycrystal-plasticity code VPSC.

Evaluating the Impact of Automated Technology in Basic Military Training Using Computer-Based Surveys

1997 ◽  
Author(s):  
Walter G. Albert ◽  
Winston Bennett ◽  
Kenneth Pemberton ◽  
Charles Holt ◽  
Pat Waldroop
Keyword(s):  
Military Training ◽  
Automated Technology ◽  
Computer Based ◽  
The Impact

Theory and Method and the Stakes of a Fragmented Discipline: Or, What Economics Taught Me About the Study of Religion

2020 ◽  
Author(s):  
Thomas A Lewis
Keyword(s):  
Religious Studies ◽  
The Public ◽  
Global Pandemic ◽  
Recent Developments ◽  
The Common ◽  
The Impact ◽  
Academic Study

Abstract As a discipline, the academic study of religion is strikingly fragmented, with little engagement or shared criteria of excellence across subfields. Although important recent developments have expanded the traditions and peoples studied as well as the methods used, the current extent of fragmentation limits the impact of this diversification and pluralization. At a moment when the global pandemic is catalyzing profound pressures on our universities and disciplines, this fragmentation makes it difficult to articulate to the public, to non-religious studies colleagues, and to students why the study of religion matters. We therefore too often fall back on platitudes. I argue for a revitalized methods and theories conversation that connects us even as it bears our arguments and disagreements about what we do and how. Courses in methods and theories in the study of religion represent the most viable basis we have for bringing the academic study of religion into the common conversation or argument that constitutes a discipline without sacrificing our pluralism.

scholarly journals A Reference Framework to Combine Model-Based Design and AR to Improve Social Sustainability

2021 ◽  
Vol 13 (4) ◽  
pp. 2031
Author(s):  
Fabio Grandi ◽  
Riccardo Karim Khamaisi ◽  
Margherita Peruzzini ◽  
Roberto Raffaeli ◽  
Marcello Pellicciari
Keyword(s):  
Positive Impact ◽  
Cost Effective ◽  
Digital Models ◽  
Model Based ◽  
Digital Contents ◽  
Recent Developments ◽  
Virtual Simulations ◽  
Product And Process ◽  
The Impact ◽  
Time Information

Product and process digitalization is pervading numerous areas in the industry to improve quality and reduce costs. In particular, digital models enable virtual simulations to predict product and process performances, as well as to generate digital contents to improve the general workflow. Digital models can also contain additional contents (e.g., model-based design (MBD)) to provide online and on-time information about process operations and management, as well as to support operator activities. The recent developments in augmented reality (AR) offer new specific interfaces to promote the great diffusion of digital contents into industrial processes, thanks to flexible and robust applications, as well as cost-effective devices. However, the impact of AR applications on sustainability is still poorly explored in research. In this direction, this paper proposed an innovative approach to exploit MBD and introduce AR interfaces in the industry to support human intensive processes. Indeed, in those processes, the human contribution is still crucial to guaranteeing the expected product quality (e.g., quality inspection). The paper also analyzed how this new concept can benefit sustainability and define a set of metrics to assess the positive impact on sustainability, focusing on social aspects.

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