Temat: thin sheet metal - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Experimental investigation of thin brass sheets under tension-compression cyclic loading
Autorzy:: Kowalewski, Z. L.
Dietrich, L.
Socha, G.
Powiązania:: https://bibliotekanauki.pl/articles/281653.pdf
Data publikacji:: 2015
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:: fixture
large deformations
tension-compression tests
thin metal sheet
Opis:: Strength and durability of thin-walled structures are usually calculated with the use of computer simulations. To perform such simulations using Finite Element Method, characteristics of a material subjected to monotonic tension or compression and tension-compression cyclic loading are necessary. Experimental determination of such kind of characteristics is usually performed on specimens cut out from a metal or composite thin sheet. Problems associated with testing on flat specimens under large deformation are discussed in this paper. A new design of fixture proposed by the authors for this kind of testing is shortly described. The results of investigations carried out on brass using the new fixture for flat specimens testing are also presented.
Źródło:: Journal of Theoretical and Applied Mechanics; 2015, 53, 3; 757-762
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: CO2 laser spot welding of thin sheets AISI 321 austenitic stainless steel
Autorzy:: Shehab, A. A.
Nawi, S. A.
Al-Rubaiy, A. AAG
Hammoudi, Z.
Hafedh, S. A.
Abass, M. H.
Alali, M. S.
Ali, S. D.
Powiązania:: https://bibliotekanauki.pl/articles/1818484.pdf
Data publikacji:: 2020
Wydawca:: Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
Tematy:: thin sheet metal
austenitic stainless steel
CO2 CW LSW
mechanical properties
welding profile
FE analysis
blachy cienkie
stal austenityczna nierdzewna
właściwości mechaniczne
profil spawalniczy
analiza elementów skończonych
Opis:: Purpose: The present work aims to investigate the influence of CO2 laser spot welding (LSW) parameters on welding profile and mechanical properties of lap joint of AISI 321 thin sheet metals, and analyze the welding profile numerically by finite element (FE) method. Design/methodology/approach: The weld carried out using 150 W CO2 continues wave laser system. The impact of exposure time and laser power on the welding profile was investigated using an optical microscope. Microhardness and tensile strength tests were used to evaluate the mechanical properties of the joint. Ansys software was utilized to simulate the welding profile numerically. Findings: The results revealed that 2 s exposure time and 50 W power have led to uniform welding profile and highest shear force (340 N), lower hardness gradient across the heat affected zone (HAZ) and fusion zone (FZ). Finite element (FE) analysis of the welding profile showed good agreement with experimental analysis. Research limitations/implications: The selection of laser spot welding parameters for thin sheet metal was critical due to the probability of metal vaporisation with extra heat input during welding. Practical implications: Laser welding of AISI 321 steel is used in multiple industrial sectors such as power plants, petroleum refinement stations, pharmaceutical industry, and households. Thus, selecting the best welding parameters ensures high-quality joint. Originality/value: The use of CO2 laser in continuous wave (CW) mode instead of pulse mode for spot welding of thin sheet metal of AISI 321 austenitic stainless steel consider a real challenge because of the difficulty of control the heat input via proper selection of the welding parameters in order to not burn the processed target. Besides, the maintenance is easier and operation cost is lower in continuous CO2 than pulse mode.
Źródło:: Archives of Materials Science and Engineering; 2020, 106, 2; 68--77
1897-2764
Pojawia się w:: Archives of Materials Science and Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Drawability Studies of Magnesium Alloy Sheets at Elevated Temperature
Badania tłoczności blach ze stopów magnezu w podwyższonej temperaturze
Autorzy:: Hyrcza-Michalska, M.
Kawalla, R.
Dembińska, J.
Powiązania:: https://bibliotekanauki.pl/articles/354262.pdf
Data publikacji:: 2015
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: drawability at elevated temperature
local strain distribution measurements
forming limit curve
AutoGrid strain analyzer
thin sheet metal
magnesium alloys
AZ31
cup forming test
rozciągliwość w podwyższonej temperaturze
pomiar rozkładu naprężeń lokalnych
krzywe graniczne
cyfrowy analizator odkształceń lokalnych AutoGrid
blachy cienkie
magnez
tłoczność blach
Opis:: The paper presents the results of a study of drawability of thin AZ31 magnesium alloy metal sheets. These studies are a continuation of experiences in presenting the characteristics of technological plasticity of strips made of magnesium alloy which have been cast between rolls in vertical and horizontal systems called ‘twin-roll casting’. In the context of previous experiments conducted at the Institute of Material Technology of the Silesian University of Technology in cooperation with the Technical University - Bergakademie Freiberg (Germany), drawability of these strips at elevated temperatures has been comprehensively defined while using forming limit curves. Due to low formability of magnesium alloys at ambient temperature, formability tests - including cup forming tests presented in this paper - have been carried out in heated dies at temperature range of 200°C to 350°C. A modern AutoGrid digital local strain analyzer has been used in the examinations and the method of image analysis of deformed coordination nets has been applied. Quantitative and qualitative impact of deformation temperature upon the drawability effects of AZ31 magnesium alloys products have been evaluated.
W pracy przedstawiono rezultaty badań tłoczności blach cienkich ze stopu magnezu AZ31. Badania te są kontynuacją doświadczeń w zakresie sporządzania charakterystyk technologicznej plastyczności blach taśmowych ze stopów magnezu odlewanych między walcami w układach pionowych i poziomych, tzw. metodą „twin roll casting”. W ramach wcześniejszych doświadczeń prowadzonych w I nstytucie Technologii Metali Politechniki Śląskiej i we współpracy z Technical University – Bergakademie Freiberg (Germany), przy zastosowaniu granicznych krzywych tłoczenia określono kompleksowo tłoczność tych blach w podwyższonej temperaturze. Z uwagi na niską odkształcalność magnezu w temperaturze otoczenia próby tłoczności, w tym prezentowaną w niniejszym opracowaniu próbę miseczkowania, wykonano w podgrzewanych matrycach w zakresie 200°C do 350°C. W badaniach wykorzystano nowoczesny, cyfrowy analizator odkształceń lokalnych AutoGrid oraz metodę analizy obrazu odkształconych siatek podziałowych. Oceniono ilościowy i jakościowy wpływ temperatury odkształcenia na efekty tłoczenia wyrobów ze stopu magnezu AZ31.
Źródło:: Archives of Metallurgy and Materials; 2015, 60, 4; 2751-2756
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Friction Stir Welding of thin Sheets of Magnesium Alloy AZ31B
Autorzy:: Myśliwiec, P.
Śliwa, R. E.
Powiązania:: https://bibliotekanauki.pl/articles/352295.pdf
Data publikacji:: 2018
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: FSW welding
magnesium alloys AZ31B
thin sheet
joining of metal sheets
Opis:: Friction stir welding developed in early 90’s is a refreshing approach to the joining of different kinds of metals. FSW has become increasingly popular and provides excellent alternative to conventional welding or riveting sheets of various metals. The paper present the results of research work on linear FSW joining magnesium alloys AZ31B of 0.5 mm in thickness. The study was conducted on properly adapted numerical controlled 3 axis milling machine using a own made tools and fastening device. The tool dimensions have been estimated in accordance with the algorithm shown in the literature [2]. All joints were made of end-to end (butt) configuration under different process parameters. The effect of selected technological parameters on the quality of the joint was analyzed. Produced butt joint have been subjected to a static tensile testing to identify mechanical features of the materials of joints compared to parent materials. Measurements of micro hardness HV in the plastically formed stir zone of joint and in the parent material have been carried out. Axial and radial welding forces in the joining region were recorded during the tests and their dependency from the welding parameters was studied . Based on results of strength tests the efficiency of joints for sheets of 0.5 mm in thicknesses oscillated up to 90% compared to the parent material. It has been found that for given parameters the correct, free of defects joints were obtained. The results suggests that FSW can be potentially applied to magnesium alloys.
Źródło:: Archives of Metallurgy and Materials; 2018, 63, 1; 45-54
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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