Temat: dissimilar joint - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Microstructure and Mechanical Properties of Braze Welded Joints of Copper with Austenitic Steel Made by CMT Method
Autorzy:: Wojdat, T.
Kustroń, P.
Margielewska, A.
Stachowicz, M.
Tematy:: arc welding-brazing
CMT method
dissimilar joint; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/354652.pdf Link otwiera się w nowym oknie
Opis:: This paper outlines issues associated with gas-shielded braze welding of CU-ETP copper with austenitic steel X5CrNi18-10(1.4301) using a consumable electrode. The possibilities for producing joints of this type using innovative low-energy welding methods are discussed. The paper provides an overview of the results of metallographic and mechanical (static shear test, microhardness) tests for braze welded joints made on an automated station using the Cold Metal Transfer (CMT) method. Significant differences in the structure and mechanical properties are indicated, resulting from the joint configuration and the type of shielding gas (argon, helium).
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Preparation of Specimens for Macro and Microscopic Examinations of Dissimilar Friction Welded Steel Joints and Their Evaluation According to Applicable Standards
Autorzy:: Ostromęcka, Małgorzata
Szymański, Michał
Tematy:: specimen preparation
macroscopic examination
microscopic examination
dissimilar joint
friction welded joints; Pokaż więcej
Wydawca:: Instytut Kolejnictwa
Powiązania:: https://bibliotekanauki.pl/articles/2116439.pdf Link otwiera się w nowym oknie
Opis:: The article describes the issues related to the preparation for microscopic and macroscopic observation of dissimilar joints obtained by friction welding of 2H13 martensitic steel with B500B reinforcing steel. The results of etching and the main difficulties connected with the preparation of this type of samples for research were presented and discussed.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Thermal Phenomena Related to Plastic Deformation During Tensile Testing and Their Microscopic Interpretation
Autorzy:: Ostromęcka, Małgorzata
Siwiec, Jakub
Tematy:: strain of materials
heat generation
tensile test
dissimilar joint
friction welding; Pokaż więcej
Wydawca:: Instytut Kolejnictwa
Powiązania:: https://bibliotekanauki.pl/articles/2116441.pdf Link otwiera się w nowym oknie
Opis:: Thermal phenomena related to plastic deformation can be commonly observed. By simply touching a ruptured or bent sample, it is clear that the temperature has risen at the deformation site. Such observations can be carried out for qualitative or quantitative assessment. This paper serves to qualitatively relate the changes in the structure of the deformed material to the temperature increase observed with an infrared camera.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Properties and Microstructure of Laser Welded Dissimilar Joints of TP347-HFG and S235JR Steels with Additional Material
Autorzy:: Danielewski, H.
Skrzypczyk, A.
Mulczyk, K.
Zrak, A.
Tematy:: laser welding
dissimilar joint
TP347HFG steel
S235JR steel
additional material
metallographic structure; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/353870.pdf Link otwiera się w nowym oknie
Opis:: Paper presents results of laser welding of dissimilar joints. Flange pipe joints of austenitic TP347-HFG and low carbon S235JR steels were performed. Possibility of laser girth welding of dissimilar joints was presented. Welding of dissimilar materials are complex phenomena, chemical composition of chromium and nickel base austenitic steel with carbon amount of 0.07%, comparing to low carbon steel with trace amount of chromium, nickel and with 0.17% of carbon are different, and affect on welding result. Amount of carbon and chromium have great effect on steel phase transformation and crystallization process, which affect on material hardenability and strength characteristic. In conventional GMA welding methods solidification process of different metals is controlled by use of a selected filler material, for creating buffer zone. The main advantages of laser welding over other methods is process without an additional material, nevertheless some application may require its use. Laser welding with additional material combines advantages of both methods. To carry out weld with high strength characteristic, without welding defects, selecting chemical composition of filler wire are required. Welding parameters was obtained using numerical simulation based on Finite Element Method (FEM). Joint properties was investigated using hardness test. Metallographic analysis of obtained weld was carried out using optical microscopy and energy dispersive spectroscopy (EDS) analysis.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Microstructure and Properties of Dissimilar Joints of AISI 430 Steel with Inconel 625 Obtained by Electron Beam Welding
Autorzy:: Dziekońska, Małgorzata
Jonda, Ewa
Sroka, Marek
Węglowski, Marek Stanisław
Jung, Tymoteusz
Tematy:: dissimilar joint
Inconel 625
Inconel 625 alloy
AISI 430
AISI 430 stainless steel
electron beam welding
microstructure
properties; Pokaż więcej
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Powiązania:: https://bibliotekanauki.pl/articles/2201845.pdf Link otwiera się w nowym oknie
Opis:: Electron Beam Welding (EBM) is a high-energy density fusion process where joint is bombarded to be welded with strongly focused beam of electrons. This method is often used for advanced materials and complex, critical parts, like turbine rotors, but it can also be used for many simpler processes involving large production runs. It is very suitable for butt welding materials of different thicknesses. The aim of this work was to study the microstructure, hardness, and electrochemical corrosion behavior between the dissimilar welds were investigated. Electron Beam Welding of dissimilar steel alloys Inconel 625 and AISI 430 was studied. In welding process there was used only welded materials without filling material. Results showed the microstructure of the weld solidified in dendritic morphology. The microstructure of fusion zone showed that dendrites grew in different directions for each grain. The dendrites and columnar grains are mainly exposed to the fusion boundary with some equiaxed grains. The hardness of the overall joint was non-uniform. The highest hardness of the HAZ/Inconel 625 (the heat-affected zone) was 258 HV, and the lowest weld zone hardness was 178 HV. The decrease in weld hardness may be due to the linear welding energy, which led to grain growth and excessive cooling. HAZ/AISI 430 steel has the lowest current density and the highest corrosion potential. Steel has a more negative corrosion potential and a lower corrosion current density than joints, likely due to higher levels of chromium. In this study, a metallographic investigation of the joints revealed no defects such as microcracks or pores. The melting temperatures of the two materials were quite different, but with the help of gravity, stainless steel acts as a permanent joint, like a rivet.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Study of microstructure, geometry and properties of laser beam welded joints made of S960QL structural steel and S304 corrosion-resistant steel
Badanie mikrostruktury, geometrii i własności spoin wykonanych metodą laserową blach ze stali konstrukcyjnej S960QL i stali odpornej na korozję S304
Autorzy:: Śliwiński, Piotr
Piotrowski, Maciej
Tematy:: spawanie laserowe
stal konstrukcyjna
stal nierdzewna
złącze bimetalowe
mikrostruktura
geometria
własności
spoina
S960QL
S304
laser welding
structural steel
stainless steel
dissimilar joint
microstructure
geometry
properties
welded joint; Pokaż więcej
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Powiązania:: https://bibliotekanauki.pl/articles/1819237.pdf Link otwiera się w nowym oknie
Opis:: Contemporary grades of structural steels are produced using a very advanced thermo-mechanical treatment processes, so their properties strongly depend on the obtained structure. Corrosion-resistant austenitic steels have a high hot cracking tendency. Therefore, it is advantageous to use welding technologies, such as laser welding, that limit the size of the joint and its heat-affected zones and thus the deformations caused by the welding process. Laser welding is also characterized by small amount of heat transferred into the material during the process which limits the hot cracking tendency. During the tests, 8 samples made of S960QL steel and S304 steel, were prepared using a Trumpf TruDisk 3302 laser welding device. The produced samples were subjected to macro- and microscopy metallographic tests. Static tensile test and bend test were also performed as well as a hardness Vickers test under a load of 100 N. Good quality joints were obtained, characterized by a small number of welding imperfections. All passed the tensile test, the rupture occurred in the base material of S304 steel. All joints passed the bend test. The hardness of the welded joints ranged from 430-480 HV.
Współczesne gatunki stali konstrukcyjnych poddawane są bardzo zaawansowanym procesom obróbki cieplno-mechanicznej, przez co ich własności silnie zależą od uzyskanej mikrostruktury. Stale austenityczne odporne na korozję cechuje natomiast skłonność do pękania gorącego. Korzystne zatem jest zastosowanie technologii spawania, takich jak spawanie laserowe, ograniczających wielkość złącza oraz jego strefy wpływu ciepła, a co za tym idzie odkształcenia wywołane procesem spawania. Spawanie laserowe cechuje się również niskimi energiami liniowymi procesu ograniczającymi zjawisko pękania gorącego. Podczas badań przygotowano 8 złączy spawanych ze stali S960QL oraz stali S304wykonanych przy pomocy urządzenia do spawania laserowego firmy Trumpf, model TruDisk 3302. Wykonane złącza zostały poddane badaniom metalograficznym makro- oraz mikroskopowym, statycznej próbie rozciągania oraz zginania, a także dokonano pomiaru twardości metodą Vickersa pod obciążeniem 100 N. Uzyskano trwałe złącza o niewielkiej liczbie niezgodności. Wszystkie złącza pomyślnie przeszły próbę rozciągania, zerwania nastąpiły w materiale rodzimym stali S304. Wszystkie złącza pomyślnie przeszły próby zginania. Twardość spoin wahała się w zakresie 430-480HV.
Dostawca treści:: Biblioteka Nauki

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