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Special Issue "Selected Papers from SSTT2016"

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

Deadline for manuscript submissions: closed (31 March 2017)

Special Issue Editors

Guest Editor
Dr. Robert Lancaster

Materials Research Centre, College of Engineering, Swansea University, Singleton Park, Swansea SA2 8PP, UK
Website | E-Mail
Phone: +44 1792 295965
Fax: +44 1792 295693
Interests: miniaturised characterisation; thermo-mechanical fatigue; nickel superalloys (single crystals, polycrystalline materials); titanium alloys; failure analysis; non-destructive evaluation; fatigue; fatigue lifing; advanced manufacturing methods
Co-Guest Editor
Dr. Karel Matocha

Material & Metallurgical Research, Ltd., Ostrava, Czech Republic
Website | E-Mail
Interests: fatigue; corrosion fatigue; fracture mechanics; special test methods
Co-Guest Editor
Prof. Dr. Shou Binan

China Special Equipment Inspection and Research Institute, Beijing, China
E-Mail
Interests: inspection; research & development; miniature test techniques; steel

Special Issue Information

Dear Colleagues,

Small scale testing is now receiving world-wide attention for the considerable cost saving benefits that it can offer whilst providing useful mechanical property information for highly localized regions, such as weldments and heat affected zones. As such, miniaturized testing is now being adopted for a wide range of applications, where subtle to significant microstructural changes are found across components. Given the success of such approaches, efforts have been made in correlating uniaxial test data with results generated from small-scale test techniques, which, in turn, have heralded the development of a European Code of Practise for small punch testing.

The 4th International Conference on Small Scale Test Techniques is due to take place in Shanghai, China, from 12–14 October, 2016, and will bring together leading researchers and scientists from academia and industry to discuss recent developments in this growing field of research. This inaugural Special Issue will collate a series of papers from the ever expanding small scale testing community to showcase the diversity and innovative nature of the research that is currently developing across the world on a broad scope of materials and applications

http://www.ssttchina.org/

Dr. Robert Lancaster
Professor Karel Matocha
Professor Shou Binan
Guest Editors

Manuscript Submission Information

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. All papers will be peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short 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 thoroughly refereed through a single-blind 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 1500 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • miniaturized testing
  • small punch test
  • rupture
  • fracture toughness
  • finite element analysis

Published Papers (3 papers)

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Research

Open AccessArticle High Temperature Deformation Mechanisms in a DLD Nickel Superalloy
Materials 2017, 10(5), 457; doi:10.3390/ma10050457
Received: 30 March 2017 / Revised: 19 April 2017 / Accepted: 21 April 2017 / Published: 26 April 2017
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Abstract
The realisation of employing Additive Layer Manufacturing (ALM) technologies to produce components in the aerospace industry is significantly increasing. This can be attributed to their ability to offer the near-net shape fabrication of fully dense components with a high potential for geometrical optimisation,
[...] Read more.
The realisation of employing Additive Layer Manufacturing (ALM) technologies to produce components in the aerospace industry is significantly increasing. This can be attributed to their ability to offer the near-net shape fabrication of fully dense components with a high potential for geometrical optimisation, all of which contribute to subsequent reductions in material wastage and component weight. However, the influence of this manufacturing route on the properties of aerospace alloys must first be fully understood before being actively applied in-service. Specimens from the nickel superalloy C263 have been manufactured using Powder Bed Direct Laser Deposition (PB-DLD), each with unique post-processing conditions. These variables include two build orientations, vertical and horizontal, and two different heat treatments. The effects of build orientation and post-process heat treatments on the materials’ mechanical properties have been assessed with the Small Punch Tensile (SPT) test technique, a practical test method given the limited availability of PB-DLD consolidated material. SPT testing was also conducted on a cast C263 variant to compare with PB-DLD derivatives. At both room and elevated temperature conditions, differences in mechanical performances arose between each material variant. This was found to be instigated by microstructural variations exposed through microscopic and Energy Dispersive X-ray Spectroscopy (EDS) analysis. SPT results were also compared with available uniaxial tensile data in terms of SPT peak and yield load against uniaxial ultimate tensile and yield strength. Full article
(This article belongs to the Special Issue Selected Papers from SSTT2016)
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Open AccessArticle Determination of Material Strengths by Hydraulic Bulge Test
Materials 2017, 10(1), 23; doi:10.3390/ma10010023
Received: 18 November 2016 / Revised: 19 December 2016 / Accepted: 22 December 2016 / Published: 30 December 2016
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Abstract
The hydraulic bulge test (HBT) method is proposed to determine material tensile strengths. The basic idea of HBT is similar to the small punch test (SPT), but inspired by the manufacturing process of rupture discs—high-pressure hydraulic oil is used instead of punch to
[...] Read more.
The hydraulic bulge test (HBT) method is proposed to determine material tensile strengths. The basic idea of HBT is similar to the small punch test (SPT), but inspired by the manufacturing process of rupture discs—high-pressure hydraulic oil is used instead of punch to cause specimen deformation. Compared with SPT method, the HBT method can avoid some of influence factors, such as punch dimension, punch material, and the friction between punch and specimen. A calculation procedure that is entirely based on theoretical derivation is proposed for estimate yield strength and ultimate tensile strength. Both conventional tensile tests and hydraulic bulge tests were carried out for several ferrous alloys, and the results showed that hydraulic bulge test results are reliable and accurate. Full article
(This article belongs to the Special Issue Selected Papers from SSTT2016)
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Open AccessArticle Correlation Factor Study of Small Punch Creep Test and Its Life Prediction
Materials 2016, 9(10), 796; doi:10.3390/ma9100796
Received: 8 August 2016 / Revised: 16 September 2016 / Accepted: 19 September 2016 / Published: 24 September 2016
Cited by 1 | PDF Full-text (2770 KB) | HTML Full-text | XML Full-text
Abstract
A small punch test is one of the innovative methods that can be used to evaluate the properties of a material without destructive harm to the in-service component. Conventionally identifying material properties by a uniaxial test is widely applied to engineering. How the
[...] Read more.
A small punch test is one of the innovative methods that can be used to evaluate the properties of a material without destructive harm to the in-service component. Conventionally identifying material properties by a uniaxial test is widely applied to engineering. How the properties obtained from a small punch test can be applied with the same utility has been a goal. In 2006, European Code of Practice (CoP) of small punch tests was first released, in which the correlation factor, ksp, was introduced to bridge the gap between the above methods. The author investigates the relationship between a uniaxial creep text and a small punch creep test by exploring the correlation factor ksp. Various sets of experiments and a comparative study of the conventional uniaxial creep test and small punch creep test were carried out. Methods including Norton, Larson-Miller and Time versus Stress relation were employed to identify the value of ksp. Different ksp values were found in different materials, which indicate that ksp values of materials need to be identified separately. In addition, the life prediction of a small punch creep test was carried out and the results of the life prediction predict a reasonable accuracy, which indicates that the small punch creep test is a reliable method for life prediction. Full article
(This article belongs to the Special Issue Selected Papers from SSTT2016)
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