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1

The Mechanical and Brittle Properties of Gas Pipeline in Service

100%

Hagarová M., Cervová J., Fujda M., Mihaliková M., Lišková A.

Acta Physica Polonica A

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2017

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vol. 132

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issue 4

1238-1241

EN

The paper deals with the determination of mechanical and brittle properties of gas pipeline after more than 40 years in operation. The heat affected zone in weld of pipeline is the risk area in terms of embrittlement structure, which resulted in an increase of yield strength and shift of transit temperature to more positive values. The specimens were cut from heat affected zone for this reason. The tensile test according to ISO 6892-1 showed the increase in yield strength: it had a value of 295 MPa at the beginning operation and 400 MPa after more than 40 years in pipeline operation was recorded. The transition temperature at the value of 20°C was determined by using the Charpy impact test according to EN 10045-1. The operators of gas pipelines report that the mean temperature on the outer surface of pipe is about 4°C during the winter. The risk of brittle fragile is very likely if the transition temperature is higher than operating temperature.

2

Friction Stir Welding of Dissimilar Butt Joints with Novel Joint Geometry

100%

Jayabalakrishnan D., Balasubramanian M.

Acta Physica Polonica A

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2018

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vol. 133

|

issue 1

94-100

EN

In this study, 1 mm thin sheets of AA 6061 and steel were welded by friction stir, with new joint geometry. Conventional friction stir welding develops high distortion to the specimen, particularly when the thickness is very small. In this process, friction stir welding is carried out by a tool without probe and with new joint geometry. Contrary to the conventional friction stir welding, where various tool profiles are used to obtain successful joints, the present study of investigation focused on developing a profile in the sheet metal edges to be joined. The aluminium sheet was positioned on the contoured steel sheet. Rotating tool with tilt angle was made to progress into the top sheet. Frictional heat plasticized the upper blank and the edges of the aluminium sheet were forged and extruded into the steel contour. The welding between steel and aluminium was due to a coalescence of the two materials and clamping effect was provided by the contour in the steel sheet. Tensile test was conducted to evaluate the quality of the welding along with macro and micro metallographic investigations. Further to this, scanning electron microscopy with energy dispersive X-ray and X-ray diffraction analysis have been done to understand the presence of intermetallics at the weld nugget. Tensile strength of 122.22 MPa was achieved. Intermetallics of Mg₂Si, MnAl₆ and FeAl₆, Al₅Fe₂ was found as dominant compound at the interface. Welding of thin sheets is enhanced by form clamping and chemical diffusion bonding.

3

The Combined Influence of Molybdenum and Nickel in Steel Welds

88%

Szczucka-Lasota B., Węgrzyn T., Kurc-Lisiecka A., Piwnik J.

Archives of Metallurgy and Materials

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2018

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vol. 63

|

issue 3

4

Modelling Grain Growth Kinetics in Steels

88%

Napoli G., Di Schino A.

Archives of Metallurgy and Materials

|

2018

|

vol. 63

|

issue 2

5

Overview of processing technologies for tungsten-steel composites and FGMs for fusion applications

75%

Matějíček J., Nevrlá B., Vilémová M., Boldyryeva H.

Nukleonika

|

2015

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vol. 60

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issue 2

267-273

EN

Tungsten is a prime candidate material for the plasma-facing components in future fusion devices, e.g. ITER and DEMO. Because of the harsh and complex loading conditions and the differences in material properties, joining of the tungsten armor to the underlying construction and/or cooling parts is a complicated issue. To alleviate the thermal stresses at the joint, a sharp interface may be replaced by a gradual one with a smoothly varying composition. In this paper, several techniques for the formation of tungsten-steel composites and graded layers are reviewed. These include plasma spraying, laser cladding, hot pressing and spark plasma sintering. Structure, composition and selected thermal and mechanical properties of representative layers produced by each of these techniques are presented. A summary of advantages and disadvantages of the techniques and an assessment of their suitability for the production of plasma-facing components is provided.

6

Examples of Simulation of the Alloying Elements Effect on Austenite Transformations During Continuous Cooling

75%

Trzaska J., Trzaska J.

Archives of Metallurgy and Materials

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2021

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vol. 66

|

issue 1

7

Ferrous Metallurgy Production in Russia: How Will the COVID-19 Pandemic Affect?

75%

Golubev S. S., Sekerin V. D., Gorokhova A. E., Shevchenko D. A., Gusov A. Z., Golubev S. S., Sekerin V. D., Gorokhova A. E., Shevchenko D. A., Gusov A. Z.

Archives of Foundry Engineering

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2021

|

issue 3

8

A New Neural Networks Model for Calculating the Continuous Cooling Transformation Diagrams

75%

Trzaska J.

Archives of Metallurgy and Materials

|

2018

|

vol. 63

|

issue 4

9

The Effect of Drawing Speed on the Ageing of High-Carbon Steel Wire

75%

Suliga M.

Archives of Metallurgy and Materials

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2018

|

vol. 63

|

issue 4

10

The Quality of the Joint Between Alloy Steel and Unalloyed Cast Steel in Bimetallic Layered Castings

75%

Wróbel T.

|

issue 1

11

Evaluation of Approaches of Numerical Modelling of Solidification of Continuously Cast Steel Billets

75%

Tkadlečková M., Michalek K., Strouhalová M., Saternus M., Merder T., Pieprzyca J., Sviželová J.

Archives of Metallurgy and Materials

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2018

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vol. 63

|

issue 2

12

Extraction-spectrophotometric study on the vanadium(V)-2,3-dihydroxynaphthalene - iodonitrotetrazolium chloride - water - chloroform system and its analytical application

75%

Simeonova Z., Gavazov K., Alexandrov A.

Open Chemistry

|

2006

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vol. 4

|

issue 2

258-265

EN

The formation of a new ternary ion-associate complex of vanadium(V) with 2,3-dihydroxynaphthalene and iodonitrotetrazolium chloride with a composition ratio of 1:2:1 is reported. The complex is quantitatively extracted from water into chloroform. The molar absorptivity (ɛ) of the extract at λ max=340 nm is 2.5 × 104 dm3/mol cm, and Beer’s law is obeyed for concentrations ranging from 0.1 to 0.9 µg/cm3 V(V). The following constants are determined: the extraction constant, the association constant, the distribution constant, and the recovery factor. The effects of foreign ions and reagents are studied. A selective and sensitive method is developed for determination of vanadium in steels.

13

Beam bond tests of GFRP and steel reinforcement to concrete

63%

Szczech D., Kotynia R., Szczech D., Kotynia R.

Archives of Civil Engineering

|

2018

|

vol. 64

|

issue 4-II

14

The history of the railway bridges by the Citadel in Warsaw

63%

Bladyniec T., Bladyniec T.

Archives of Civil Engineering

|

2019

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vol. 65

|

issue 1

15

Nonlinear longitudinal shear distribution in steel-concrete composite beams

63%

Grzeszykowski B., Szmigiera E., Grzeszykowski B., Szmigiera E.

Archives of Civil Engineering

|

2019

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vol. 65

|

issue 1

16

Interpolation formulas for coefficients reducing the strength of steel and aluminum alloys in increasing temperatures

54%

Gwóźdź M., Gwóźdź M.

Archives of Civil Engineering

|

2017

|

issue 2

17

Modern trade standards for steel raw materials

51%

Krzak M., Paulo A., Krzak M., Paulo A.

Gospodarka Surowcami Mineralnymi

|

2018

|

vol. 34

|

issue 4

Refine search results

The Mechanical and Brittle Properties of Gas Pipeline in Service

Friction Stir Welding of Dissimilar Butt Joints with Novel Joint Geometry

The Combined Influence of Molybdenum and Nickel in Steel Welds

Modelling Grain Growth Kinetics in Steels

Overview of processing technologies for tungsten-steel composites and FGMs for fusion applications

Examples of Simulation of the Alloying Elements Effect on Austenite Transformations During Continuous Cooling

Ferrous Metallurgy Production in Russia: How Will the COVID-19 Pandemic Affect?

A New Neural Networks Model for Calculating the Continuous Cooling Transformation Diagrams

The Effect of Drawing Speed on the Ageing of High-Carbon Steel Wire

The Quality of the Joint Between Alloy Steel and Unalloyed Cast Steel in Bimetallic Layered Castings

Evaluation of Approaches of Numerical Modelling of Solidification of Continuously Cast Steel Billets

Extraction-spectrophotometric study on the vanadium(V)-2,3-dihydroxynaphthalene - iodonitrotetrazolium chloride - water - chloroform system and its analytical application

Beam bond tests of GFRP and steel reinforcement to concrete

The history of the railway bridges by the Citadel in Warsaw

Nonlinear longitudinal shear distribution in steel-concrete composite beams

Interpolation formulas for coefficients reducing the strength of steel and aluminum alloys in increasing temperatures

Modern trade standards for steel raw materials