scholarly journals EFFICIENCY ADJUSTMENT OF STANDARD THERMAL TREATMENT OF 30HGSA STEEL

2016 ◽  
Vol 2016 (2) ◽  
pp. 121-128 ◽  
Author(s):  
Ирина Ворначева ◽  
Irina Vornacheva ◽  
Василий Муравьев ◽  
Vasiliy Muravev ◽  
Алексей Фролов ◽  
...  
Keyword(s):  
Martensitic Transformation ◽  
Thermal Treatment ◽  
Strength Properties ◽  
Defective Structure ◽  
Bainitic Hardening

The efficiency of thermal treatment of 30HGSA steel is considered. The mode of bainitic hardening contributing to smoothing of steel defective structure a more complete martensitic transformation and, as a consequence, to the increase of plastic and strength properties is considered.

scholarly journals Влияние низкотемпературной термообработки на развитие сверхэластичности в монокристаллах Ti-50.6 at.% Ni

2019 ◽  
Vol 45 (3) ◽  
pp. 55
Author(s):  
Е.Е. Тимофеева ◽  
Н.Ю. Суриков ◽  
А.И. Тагильцев ◽  
А.С. Ефтифеева ◽  
А.Б. Тохметова ◽  
...  
Keyword(s):  
Martensitic Transformation ◽  
Low Temperature ◽  
Single Crystals ◽  
High Strength ◽  
Strength Properties ◽  
Martensite Formation ◽  
Nanoscale Particles ◽  
Low Temperature Aging ◽  
Temperature Aging

AbstractAs a result of low-temperature aging at 573 K for 1.5 h of Ti–50.6 at% Ni [001]-oriented single crystals quenched from 1253 K, a high-strength state is obtained due to the precipitation of Ti_3Ni_4 nanoscale particles ( d < 10 nm). The aging leads to the development of the B 2– B 19' martensitic transformation through an intermediate R phase, a reduction in the B 19' martensite formation temperatures by 40–60 K, an increase in the strength properties of the B 2 phase from 730 to 2100 MPa, and an extension of the superelasticity interval Δ T _SE in compression from Δ T _SE = 60 to 170 K (compared to quenched crystals).

scholarly journals Magnetic and Magnetostrictive Properties of Ni50Mn20Ga27Cu3 Rapidly Quenched Ribbons

Materials ◽  
2021 ◽  
Vol 14 (18) ◽  
pp. 5126
Author(s):  
Mihaela Sofronie ◽  
Mugurel Tolea ◽  
Bogdan Popescu ◽  
Monica Enculescu ◽  
Felicia Tolea
Keyword(s):  
Magnetic Field ◽  
Martensitic Transformation ◽  
Thermal Treatment ◽  
Austenite Phase ◽  
Transformation Temperatures ◽  
Strain Measurements ◽  
Rapid Solidification Technique ◽  
Phase Transition Temperatures ◽  
Ferromagnetic Shape Memory ◽  
Curie Temperatures

The influence of the rapid solidification technique and heat treatment on the martensitic transformation, magnetic properties, thermo- and magnetic induced strain and electrical resistivity is investigated for the Cu doped NiMnGa Heusler-based ferromagnetic shape memory ribbons. The martensitic transformation temperatures are unexpectedly low (below 90 K—which can be attributed to the disordered texture as well as to the uncertainty in the elements substituted by the Cu), preceded by a premartensitic transformation (starting at around 190 K). A thermal treatment slightly increases the transformation as well as the Curie temperatures. Additionally, the thermal treatment promotes a higher magnetization value of the austenite phase and a lower one in the martensite. The shift of the martensitic transformation temperatures induced by the applied magnetic field, quantified from thermo-magnetic and thermo-magnetic induced strain measurements, is measured to have a positive value of about 1 K/T, and is then used to calculate the transformation entropy of the ribbons. The magnetostriction measurements suggest a rotational mechanism in low fields for the thermal treated samples and a saturation tendency at higher magnetic fields, except for the temperatures close to the phase transition temperatures (saturation is not reached at 5 T), where a linear volume magnetostriction cannot be ruled out. Resistivity and magnetoresistance properties have also been measured for all the samples.

Background to the Topics Concerned in the Present Papers

2008 ◽  
Vol 599 ◽  
pp. 1-78
Author(s):  
Pentti O. Kettunen
Keyword(s):  
Heat Treatment ◽  
Thermal Treatment ◽  
Mechanical Strength ◽  
Strength Properties ◽  
External Loading ◽  
General Knowledge ◽  
Structure And Properties ◽  
The Status ◽  
And Behavior

The present background description concentrates on the structure of wood xylem, on the mechanical strength properties under monotonic external loading, on the degradation of the structure of wood and somewhat also on the influence of thermal treatment (heat treatment) on the structure and properties of wood. The presentation is largely based on a recent publication of the author /1/. In this manner, the description tries to illustrate the status of the present general knowledge in the fields, into which the present papers bring new results and ideas for a better understanding of the structure and behavior of wood.

scholarly journals Thermal Treatment of Carbidostals TiC – I2XI8H10T

2022 ◽  
Author(s):  
L.M. Savinykh
Keyword(s):  
Thermal Treatment ◽  
Titanium Carbide ◽  
Abrasive Wear ◽  
Strength Properties ◽  
Important Task

Abstract. An important task of thermal treatment of carbidostals having different composition of titanium carbide and steel I2XI8H10T is the possibility of improving their strength properties during operation under abrasive wear conditions. This question is new and little studied.

scholarly journals Effect of Alloy Additions on the Structure and Mechanical Properties of the AlSi7Mg0.3 Alloy

2017 ◽  
Vol 17 (1) ◽  
pp. 137-142
Author(s):  
B. P. Pisarek ◽  
C. Rapiejko ◽  
T. Szymczak ◽  
T. Pacyniak
Keyword(s):  
Mechanical Properties ◽  
Thermal Treatment ◽  
Ambient Temperature ◽  
Investment Casting ◽  
Aluminium Alloys ◽  
Quality Index ◽  
Strength Properties ◽  
Intermetallic Phases ◽  
Industrial Technology ◽  
Made In

Abstract The study presents the results of the investigations of the effect of Cu, Ni, Cr, V, Mo and W alloy additions on the microstructure and mechanical properties of the AlSi7Mg0.3 alloy. The examinations were performed within a project the aim of which is to elaborate an experimental and industrial technology of producing elements of machines and devices complex in their construction, made of aluminium alloys by the method of precision investment casting. It was demonstrated that a proper combination of alloy additions causes the crystallization of complex intermetallic phases in the silumin, shortens the SDAS and improves the strength properties: Rm, Rp0.2,HB hardness. Elevating these properties reduces At, which, in consequence, lowers the quality index Q of the alloy of the obtained casts. Experimental casts were made in ceramic moulds preliminarily heated to 160 °C, into which the AlSi7Mg0.3 alloy with the additions was cast, followed by its cooling at ambient temperature. With the purpose of increasing the value of the quality index Q, it is recommended that the process of alloy cooling in the ceramic mould be intensified and/or a thermal treatment of the casts be performed (ageing)(T6).

Structure and Shape Memory Effect in Annealed Ni-Ti-Co Strip Produced by Twin Roll Casting Technique

2009 ◽  
Vol 154 ◽  
pp. 59-64 ◽  
Author(s):  
Tomasz Goryczka
Keyword(s):  
Martensitic Transformation ◽  
Thermal Treatment ◽  
Shape Memory ◽  
Shape Memory Effect ◽  
Shape Recovery ◽  
Real Condition ◽  
Casting Technique ◽  
Multi Stage ◽  
Roll Casting ◽  
Twin Roll

The ternary Ni47Ti50Co3 alloy was produced using twin rolls casting technique. The strip was annealed at 3000C, 4000C or 5000C for 1 hour. Annealing was carried out in real condition without protection atmosphere. The strips revealed a multi-stage martensitic transformation. However, the origin of this multi-stage transformation is different in the as-cast strip when compare to the thermally treated samples. Thermal treatment increases amount of preferentially oriented grains and in consequence higher degree of the shape recovery can be obtained.

Pollutant Identification by Selected Area Electron Diffraction

1974 ◽  
Vol 32 ◽  
pp. 532-533
Author(s):  
R. E. Ferrell ◽  
G. G. Paulson ◽  
C. W. Walker
Keyword(s):  
Thermal Treatment ◽  
Electron Diffraction ◽  
Sample Preparation ◽  
Crystal Structures ◽  
Water Samples ◽  
Environmental Samples ◽  
Short Review ◽  
Selected Area Electron Diffraction ◽  
Multiple Component

Selected area electron diffraction (SAD) has been used successfully to determine crystal structures, identify traces of minerals in rocks, and characterize the phases formed during thermal treatment of micron-sized particles. There is an increased interest in the method because it has the potential capability of identifying micron-sized pollutants in air and water samples. This paper is a short review of the theory behind SAD and a discussion of the sample preparation employed for the analysis of multiple component environmental samples.

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