Next Issue
Volume 3, December
Previous Issue
Volume 3, June
 
 

Metals, Volume 3, Issue 3 (September 2013) – 4 articles , Pages 237-318

  • Issues are regarded as officially published after their release is announced to the table of contents alert mailing list.
  • You may sign up for e-mail alerts to receive table of contents of newly released issues.
  • PDF is the official format for papers published in both, html and pdf forms. To view the papers in pdf format, click on the "PDF Full-text" link, and use the free Adobe Reader to open them.
Order results
Result details
Section
Select all
Export citation of selected articles as:
2492 KiB  
Article
Exotic Alloys Obtained by Condensation of Metallic Vapors
by R. J. Slobodrian
Metals 2013, 3(3), 312-318; https://0-doi-org.brum.beds.ac.uk/10.3390/met3030312 - 24 Sep 2013
Viewed by 4692
Abstract
New methods of producing small quantities of exotic alloys from immiscible metals (and elements in general) are described with two examples: An alloy of aluminium with silver and one of aluminium with tungsten. There is no limit to the number of components that [...] Read more.
New methods of producing small quantities of exotic alloys from immiscible metals (and elements in general) are described with two examples: An alloy of aluminium with silver and one of aluminium with tungsten. There is no limit to the number of components that can form special alloys by this method and their applications can be foreseen to be quite useful in the future. Full article
Show Figures

Figure 1

3007 KiB  
Article
The Thermal Transformation Arrest Phenomenon in NiCoMnAl Heusler Alloys
by Xiao Xu, Wataru Ito, Masashi Tokunaga, Takumi Kihara, Kengo Oka, Rie Y. Umetsu, Takeshi Kanomata and Ryosuke Kainuma
Metals 2013, 3(3), 298-311; https://0-doi-org.brum.beds.ac.uk/10.3390/met3030298 - 22 Aug 2013
Cited by 36 | Viewed by 6858
Abstract
In this report, we present findings of systematic research on NiCoMnAl alloys, with the purpose of acquiring a higher thermal transformation arrest temperature (TA). By systematic research, TA in the NiCoMnAl alloy systems was raised up to 190 K, compared to the highest [...] Read more.
In this report, we present findings of systematic research on NiCoMnAl alloys, with the purpose of acquiring a higher thermal transformation arrest temperature (TA). By systematic research, TA in the NiCoMnAl alloy systems was raised up to 190 K, compared to the highest TA of 130 K in NiCoMnIn. For a selected alloy of Ni40Co10Mn33Al17, magnetization measurements were performed under a pulsed high magnetic field, and the critical magnetic field-temperature phase diagram was determined. The magnetic phase diagram for Ni50-xCoxMn50-yAly was also established. Moreover, from the discussion that the formerly called “kinetic arrest phenomenon” has both thermodynamic and kinetic factors, we suggest a terminology change to the “thermal transformation arrest phenomenon”. Full article
(This article belongs to the Special Issue Shape Memory Alloys)
Show Figures

6608 KiB  
Article
Grain Refinement and Deformation Mechanisms in Room Temperature Severe Plastic Deformed Mg-AZ31
by Enrico Knauer, Jens Freudenberger, Tom Marr, Alexander Kauffmann and Ludwig Schultz
Metals 2013, 3(3), 283-297; https://0-doi-org.brum.beds.ac.uk/10.3390/met3030283 - 18 Jul 2013
Cited by 21 | Viewed by 7561
Abstract
A Ti-AZ31 composite was severely plastically deformed by rotary swaging at room temperature up to a logarithmic deformation strain of 2.98. A value far beyond the forming limit of pure AZ31 when being equivalently deformed. It is observed, that the microstructure evolution in [...] Read more.
A Ti-AZ31 composite was severely plastically deformed by rotary swaging at room temperature up to a logarithmic deformation strain of 2.98. A value far beyond the forming limit of pure AZ31 when being equivalently deformed. It is observed, that the microstructure evolution in Mg-AZ31 is strongly influenced by twinning. At low strains the {̅1011} (10̅12) and the {̅1012} (10̅11) twin systems lead to fragmentation of the initial grains. Inside the primary twins, grain refinement takes place by dynamic recrystallization, dynamic recovery and twinning. These mechanisms lead to a final grain size of ≈1 μm, while a strong centered ring fibre texture is evolved. Full article
(This article belongs to the Special Issue Nanostructured Metal and Metal Oxide Materials)
Show Figures

Graphical abstract

1013 KiB  
Review
Transformation Volume Effects on Shape Memory Alloys
by Volodymyr A. Chernenko, Victor A. L'vov, Eduard Cesari, Anna Kosogor and Jose M. Barandiaran
Metals 2013, 3(3), 237-282; https://0-doi-org.brum.beds.ac.uk/10.3390/met3030237 - 02 Jul 2013
Cited by 34 | Viewed by 8020
Abstract
It is generally accepted that the martensitic transformations (MTs) in the shape memory alloys (SMAs) are mainly characterized by the shear deformation of the crystal lattice that arises in the course of MT, while a comparatively small volume change during MT is considered [...] Read more.
It is generally accepted that the martensitic transformations (MTs) in the shape memory alloys (SMAs) are mainly characterized by the shear deformation of the crystal lattice that arises in the course of MT, while a comparatively small volume change during MT is considered as the secondary effect, which can be disregarded when the basic characteristics of MTs and functional properties of SMAs are analyzed. This point of view is a subject to change nowadays due to the new experimental and theoretical findings. The present article elucidates (i) the newly observed physical phenomena in different SMAs in their relation to the volume effect of MT; (ii) the theoretical analysis of the aforementioned volume-related phenomena. Full article
(This article belongs to the Special Issue Shape Memory Alloys)
Show Figures

Figure 1

Previous Issue
Next Issue
Back to TopTop