Role of alloying elements during thermocyclic oxidation of β/γ-TiAl alloys at high temperatures

2017 ◽  
Vol 691 ◽  
pp. 489-497 ◽  
Author(s):  
Muhammad Naveed ◽  
A. Flores Renteria ◽  
Sabine Weiß
Keyword(s):  
High Temperatures ◽  
Alloying Elements ◽  
Tial Alloys

A Review on Influence of Alloying Elements on the Microstructure and Mechanical Properties of Cu-Al-Ni Shape Memory Alloys

2013 ◽  
Vol 64 (1) ◽  
Author(s):  
Safaa Najah Saud ◽  
Esah Hamzah ◽  
Tuty Asma Abu Bakar ◽  
Raheleh Hosseinian.S
Keyword(s):  
Mechanical Properties ◽  
Shape Memory Alloys ◽  
Shape Memory ◽  
High Temperatures ◽  
Al Alloys ◽  
Alloying Elements ◽  
Ability To Work ◽  
Morphology And Structure ◽  
High Transformation

Cu–Al–Ni shape memory alloys (SMAs) have been developed for high temperatures engineering components such as sensor and actuators, due to their ability to work at temperatures near 200°C, rather than NiTi and Cu–Zn–Al alloys whose maximum working temperatures around 100°C. These alloys are widely used because they are much cheaper than NiTi/Cu-Zn-Al and do not require any complicated processing during their manufacturing as do for other shape memory alloys. In addition, these alloys have a small hysteresis and high transformation temperatures compared with other alloys. Despite all these advantages, these alloys have their limitations such as brittleness and low phase recovery strains and stress. The present review describes the role of alloying elements on the properties of Cu-Al-Ni shape memory alloys. It has been found that the additions of alloying elements have a significant effect on the formation, morphology, and structure of the obtained martensite, therefore, the properties of these alloys varied in accordance of these effects.

Mossbauer Study of the Role of Aluminum and Chromium in Nitrogen Implanted Iron

1991 ◽  
Vol 235 ◽  
Author(s):  
M. Kopcewicz ◽  
J. Jagielski ◽  
A. Turos ◽  
D. L. Williamson
Keyword(s):  
Thermal Stability ◽  
Ion Implantation ◽  
Metallic Iron ◽  
Conversion Electron ◽  
Alloying Elements ◽  
Mössbauer Study ◽  
Conversion Electron Mössbauer Spectroscopy ◽  
Conversion Electron Mossbauer Spectroscopy ◽  
Thermal Stability Of

ABSTRACTThe role of alloying elements such as Cr and Al in the formation and stability of the nitride phases formed due to N ion implantation into metallic iron was studied by conversion electron Mössbauer spectroscopy (CEMS). The thermal stability of nitride phases upon 1 h annealing was greatly increased as a result of co-implanting either Cr or Al with N as compared to pure α-Fe implanted only with N.

scholarly journals Molecular Dynamics of Chloroplast Membranes Isolated from Wild-Type Barley and a Brassinosteroid-Deficient Mutant Acclimated to Low and High Temperatures

Biomolecules ◽  
2020 ◽  
Vol 11 (1) ◽  
pp. 27
Author(s):  
Iwona Sadura ◽  
Dariusz Latowski ◽  
Jana Oklestkova ◽  
Damian Gruszka ◽  
Marek Chyc ◽  
...  
Keyword(s):  
Molecular Dynamics ◽  
Temperature Stress ◽  
High Temperatures ◽  
Biological Membrane ◽  
Hydrophobic Core ◽  
Wild Type ◽  
Chloroplast Membranes ◽  
Paramagnetic Resonance ◽  
Photosynthetic Membranes

Plants have developed various acclimation strategies in order to counteract the negative effects of abiotic stresses (including temperature stress), and biological membranes are important elements in these strategies. Brassinosteroids (BR) are plant steroid hormones that regulate plant growth and development and modulate their reaction against many environmental stresses including temperature stress, but their role in modifying the properties of the biological membrane is poorly known. In this paper, we characterise the molecular dynamics of chloroplast membranes that had been isolated from wild-type and a BR-deficient barley mutant that had been acclimated to low and high temperatures in order to enrich the knowledge about the role of BR as regulators of the dynamics of the photosynthetic membranes. The molecular dynamics of the membranes was investigated using electron paramagnetic resonance (EPR) spectroscopy in both a hydrophilic and hydrophobic area of the membranes. The content of BR was determined, and other important membrane components that affect their molecular dynamics such as chlorophylls, carotenoids and fatty acids in these membranes were also determined. The chloroplast membranes of the BR-mutant had a higher degree of rigidification than the membranes of the wild type. In the hydrophilic area, the most visible differences were observed in plants that had been grown at 20 °C, whereas in the hydrophobic core, they were visible at both 20 and 5 °C. There were no differences in the molecular dynamics of the studied membranes in the chloroplast membranes that had been isolated from plants that had been grown at 27 °C. The role of BR in regulating the molecular dynamics of the photosynthetic membranes will be discussed against the background of an analysis of the photosynthetic pigments and fatty acid composition in the chloroplasts.

The role of acetic acid in FeCO3 scale deposition on CO2 corrosion of API X65 carbon steel under high temperatures

2021 ◽  
pp. 1-12
Author(s):  
Bernardo Augusto Farah Santos ◽  
Rhuan Costa Souza ◽  
Maria Eduarda Dias Serenario ◽  
Eugenio Pena Mendes Junior ◽  
Thiago Araujo Simões ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Carbon Steel ◽  
High Temperatures ◽  
Co2 Corrosion ◽  
Scale Deposition

scholarly journals Deformation Behavior at High Temperatures in TiAl Alloys Containing TiN Particles.

1997 ◽  
Vol 44 (6) ◽  
pp. 577-581
Author(s):  
Shouichi Ochiai ◽  
Hitoshi Takeda ◽  
Yoshiro Kojima ◽  
Shunji Kikuhara
Keyword(s):  
High Temperatures ◽  
Deformation Behavior ◽  
Tial Alloys

Model thermodynamics and the role of free-carrier energy at high temperatures: Nitrogen and boron pairing in diamond

2009 ◽  
Vol 80 (5) ◽  
Author(s):  
R. M. MacLeod ◽  
S. W. Murray ◽  
J. P. Goss ◽  
P. R. Briddon ◽  
R. J. Eyre
Keyword(s):  
High Temperatures ◽  
Free Carrier ◽  
Carrier Energy

Role of alloying elements in vanadium-based binary alloy membranes for hydrogen separation

2012 ◽  
Vol 423-424 ◽  
pp. 332-341 ◽  
Author(s):  
Young-Su Lee ◽  
Chuying Ouyang ◽  
Jin-Yoo Suh ◽  
Eric Fleury ◽  
Young Whan Cho ◽  
...  
Keyword(s):  
Binary Alloy ◽  
Hydrogen Separation ◽  
Alloying Elements

Conduction and Hall measurements ofBa2YCu3O6+δfilms at high temperatures: The role of oxygen

1988 ◽  
Vol 38 (4) ◽  
pp. 2828-2831 ◽  
Author(s):  
A. Davidson ◽  
P. Santhanam ◽  
A. Palevski ◽  
M. J. Brady
Keyword(s):  
High Temperatures ◽  
Hall Measurements

scholarly journals Role of alloying elements on twin growth and twin transmission in magnesium alloys

2017 ◽  
Vol 706 ◽  
pp. 295-303 ◽  
Author(s):  
M. Arul Kumar ◽  
I.J. Beyerlein ◽  
R.A. Lebensohn ◽  
C.N. Tomé
Keyword(s):  
Magnesium Alloys ◽  
Alloying Elements ◽  
Twin Growth

The Role of Leaf Epicuticular Wax in the Adaptation of Wheat ( Triticum aestivum L.) to High Temperatures and Moisture Deficit Conditions

Crop Science ◽  
2018 ◽  
Vol 58 (2) ◽  
pp. 679-689 ◽  
Author(s):  
Suheb Mohammed ◽  
Trevis D. Huggins ◽  
Francis Beecher ◽  
Chris Chick ◽  
Padma Sengodon ◽  
...  
Keyword(s):  
Triticum Aestivum ◽  
High Temperatures ◽  
Triticum Aestivum L ◽  
Epicuticular Wax ◽  
Moisture Deficit ◽  
Leaf Epicuticular Wax
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