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Special Issue "Superalloys"

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A special issue of Materials (ISSN 1996-1944).

Deadline for manuscript submissions: closed (31 March 2013)

Special Issue Editor

Guest Editor
Dr. Johan Moverare

Division of Engineering Materials, Department of Management & Engineering, Linköping University, SE-581 83 Linköping, Sweden
Phone: +46 13 281141
Interests: superalloys; thermomechanical fatigue; creep; oxidation; aging; material modelling

Special Issue Information

Dear Colleagues,

Superalloys form an important class of materials and are typically used for aerospace propulsion, energy generation and chemical processing due to their high resistance to mechanical and chemical degradation. Superalloys are not cheap materials and must therefore demonstrate value to the customers by some other means and are therefore most often found in critical components in severe environments operating near the limits of their capability. As a consequence good knowledge about superalloys has been very important and a lot of scientific works have been dedicated to these materials. Still there are significant demands for improved high temperature materials to enable further technology advances and therefore the scientific and engineering interest for superalloys remains. This special issue focuses on advances in alloy development and processing, characterization and modelling of high temperature behaviour and the physical metallurgy of superalloys.

Dr. Johan Moverare
Guest Editor

Submission

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. Papers will be published continuously (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are refereed through a peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Materials is an international peer-reviewed Open Access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 1400 CHF (Swiss Francs).

Related Special Issue

Published Papers (2 papers)

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Research

Open AccessArticle Prediction of Microporosity in Complex Thin-Wall Castings with the Dimensionless Niyama Criterion
Materials 2013, 6(5), 1789-1802; doi:10.3390/ma6051789
Received: 5 March 2013 / Revised: 7 April 2013 / Accepted: 10 April 2013 / Published: 7 May 2013
Cited by 5 | PDF Full-text (1246 KB) | HTML Full-text | XML Full-text
Abstract
The dimensionless Niyama criterion was used to predict the formation of microporosity in nickel-based superalloy casting, which extended the model application from a simple plate casting to complex thin-wall superalloy casting. The physical characteristics of the superalloy were calculated by JMatPro software. [...] Read more.
The dimensionless Niyama criterion was used to predict the formation of microporosity in nickel-based superalloy casting, which extended the model application from a simple plate casting to complex thin-wall superalloy casting. The physical characteristics of the superalloy were calculated by JMatPro software. The relation between the volume percentage of microporosity and the dimensionless Niyama values were constructed. Quantitative metallographic measurements of the microporosity of the practical thin-wall casting were carried out. The prediction agreed well with the experiment in general, except for some thick-wall sites in the casting. Full article
(This article belongs to the Special Issue Superalloys)
Open AccessArticle Recent Advances in Creep Modelling of the Nickel Base Superalloy, Alloy 720Li
Materials 2013, 6(3), 1118-1137; doi:10.3390/ma6031118
Received: 4 January 2013 / Revised: 15 February 2013 / Accepted: 12 March 2013 / Published: 20 March 2013
Cited by 8 | PDF Full-text (2487 KB) | HTML Full-text | XML Full-text
Abstract
Recent work in the creep field has indicated that the traditional methodologies involving power law equations are not sufficient to describe wide ranging creep behaviour. More recent approaches such as the Wilshire equations however, have shown promise in a wide range of [...] Read more.
Recent work in the creep field has indicated that the traditional methodologies involving power law equations are not sufficient to describe wide ranging creep behaviour. More recent approaches such as the Wilshire equations however, have shown promise in a wide range of materials, particularly in extrapolation of short term results to long term predictions. In the aerospace industry however, long term creep behaviour is not critical and more focus is required on the prediction of times to specific creep strains. The current paper illustrates the capability of the Wilshire equations to recreate full creep curves in a modern nickel superalloy. Furthermore, a finite-element model based on this method has been shown to accurately predict stress relaxation behaviour allowing more accurate component lifing. Full article
(This article belongs to the Special Issue Superalloys)

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