Control of electric parameters for the estimation of martensite transformations in austenitic steels

2019 ◽  
Author(s):  
M. B. Rigmant ◽  
M. K. Korkh ◽  
I. A. Proskurina
Keyword(s):  
Austenitic Steels ◽  
Martensite Transformations ◽  
Electric Parameters

In-Situ Neutron Diffraction Study of the Deformation Behaviour of Two High-Manganese Austenitic Steels

2011 ◽  
Vol 681 ◽  
pp. 474-479 ◽  
Author(s):  
Ru Lin Peng ◽  
Xiao Peng Liu ◽  
Yan Dong Wang ◽  
Shu Yan Zhang ◽  
Yong Feng Shen ◽  
...  
Keyword(s):  
Neutron Diffraction ◽  
Deformation Behaviour ◽  
Tensile Loading ◽  
Neutron Diffraction Study ◽  
Austenitic Steels ◽  
Ε Martensite ◽  
Martensite Transformations ◽  
Iron Manganese ◽  
Mn Steel

In-situ neutron diffraction experiments under tensile loading were carried out to study the micromechanical behaviour of two iron-manganese based steels, a TWIP (twinning induced plasticity) steel with 30 wt% Mn and a TRIP steel (transformation induced plasticity) with 20 wt% Mn. The former was loaded to 31.3% strain and the latter to 20% strain. The 30 wt.% Mn steel had a fully austenitic microstructure which remained stable over the loading range studied, while stress induced austenite to α´- and ε-martensite transformations occur in the 20 wt.% Mn steel which initially contained an α´-martensite in addition to the austenite. The evolution of lattice strains under tensile loading differs between the two steels, reflected their different plastic deformation mechanisms. A stronger grain-orientation dependent behaviour is observed during deformation for the 20 wt.% Mn in contrast to the 30wt.% Mn steel.

Influence of Morphology of Deformation Induced α´-Martensite on Stress-Strain Response in a Two Phase Austenitic-Martensitic-Steel

2013 ◽  
Vol 592-593 ◽  
pp. 582-585 ◽  
Author(s):  
Robert Skorupski ◽  
Marek Smaga ◽  
Dietmar Eifler ◽  
Regina Schmitt ◽  
Ralf Müller
Keyword(s):  
Deformation Behavior ◽  
Research Work ◽  
Phase Field Model ◽  
Austenitic Steels ◽  
Strain Response ◽  
Martensitic Steels ◽  
Stress Strain ◽  
Two Phase ◽  
Martensitic Microstructure ◽  
Martensite Transformations

In this research work specimens of the metastable austenitic steels AISI 304 and AISI 347 with one phase (fully austenitic) and two phase (austenitic-α ́-martensitic) microstructure were monotonically loaded at ambient temperature. Using stress-strain and temperature measurements the deformation behavior was characterized in detail. To study the influence of morphology of deformation induced α ́-martensite on the stress-strain response a phase field model for α ́-martensite transformations was developed. With this approach it was possible to model the two phase austenite-α ́-martensite microstructure and investigate the deformation behavior on the micro level. With optical microscopy, magnetic and x-ray measurements the microstructure characterization of fully austenitic and austenitic-α ́-martensitic steels was realized.

Analysis of Characteristics of LED Lamps with T8 Bulb by Various Manufacturers

2019 ◽  
pp. 82-87
Author(s):  
Nina P. Nestyorkina ◽  
Olga Yu. Kovalenko ◽  
Yulia A. Zhuravlyova
Keyword(s):  
Supply Voltage ◽  
Luminous Flux ◽  
Supply Network ◽  
Operational Characteristics ◽  
Nominal Voltage ◽  
Electric Parameters ◽  
The Moment ◽  
Colour Rendering

The article analyses the operational characteristics of 10W LED lamps with T8 bulb manufactured by ASD (Russia), Smartbuy (Taiwan), and VOLPE (PRC) and 18W FL with T8 bulb manufactured by PHILIPS (Poland) including the dependence of these lamps on the supply voltage. The results of measurements show that: a) the period of stabilisation of electric parameters and luminous flux of LED lamps does not cause discomfort of illumination unlike the said FL, the luminous flux of which at the moment of switching on is 70 % of the nominal value, which is reached after 13 minutes; b) with nominal voltage of supply network, the value of luminous flux of 10W ASD LED-T8R-STD LED lamp (Russia) is 6 % less than the declared one, and that of Smartbuy SBL-T8-10-64K-A (Taiwan) and VOLPE LED-T8-10W/DW/G13/FR/FIX/N (PRC) is even less; c) the general colour rendering index of all studied LED lamps is less than the declared one (72 instead of 80); d) the flicker index of all studied LED lamps does not exceed the declared value of 5 %; e) the characteristics of LED lamps almost do not depend on changes of the supply voltage within the range of ±10 %. The recommendations regarding the application of the studied LED lamps are given.

Descaling of austenitic steels by laser radiation

1994 ◽  
Author(s):  
H. Schlüter ◽  
A. Zwick ◽  
M. Aden ◽  
G. Uhlig ◽  
K. Wissenbach ◽  
...  
Keyword(s):  
Laser Radiation ◽  
Austenitic Steels

Activity of Nitrogen in Austenitic Steels

1975 ◽  
Vol 61 (13) ◽  
pp. 2892-2903 ◽  
Author(s):  
Makoto KIKUCHI ◽  
Ryohei TANAKA
Keyword(s):  
Austenitic Steels

NIROSTA 4305

Alloy Digest ◽  
2002 ◽  
Vol 51 (5) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Physical Properties ◽  
Tungsten Carbide ◽  
Tensile Properties ◽  
High Speed ◽  
High Speed Steel ◽  
Heat Treating ◽  
Austenitic Steels ◽  
High Sulfur Content ◽  
Machined Parts

Abstract NIROSTA 4305 is an austenitic alloy with a high sulfur content. The alloy is typically used for machined parts. As with other austenitic steels, it is necessary to machine with good-quality high-speed steel or tungsten carbide tools. This datasheet provides information on composition, physical properties, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SS-854. Producer or source: ThyssenKrupp Nirosta GmbH.

ALLEGHENY LUDLUM TYPE 205

Alloy Digest ◽  
1997 ◽  
Vol 46 (10) ◽  
Keyword(s):  
Mechanical Properties ◽  
Stainless Steel ◽  
Corrosion Resistance ◽  
Physical Properties ◽  
Tensile Properties ◽  
Magnetic Permeability ◽  
Cold Working ◽  
High Strength ◽  
Heat Treating ◽  
Austenitic Steels

Abstract Allegheny Stainless Type 205 is a chromium-manganese nitrogen austenitic high strength stainless steel that maintains its low magnetic permeability even after large amounts of cold working. Annealed Type 205 has higher mechanical properties than any of the conventional austenitic steels-and for any given strength level, the ductility of Type 205 is comparable to that of Type 301. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fatigue. It also includes information on corrosion resistance as well as heat treating, machining, and joining. Filing Code: SS-640. Producer or source: Allegheny Ludlum Corporation. Originally published March 1996, revised October 1997.

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