scholarly journals STRUCTURE AND PROPERTIES OF MELTED AREAS FORMED AT THE BORDER OF SECTION IN EXPLOSION WELDED JOINTS ALUMINUM-IRON-BASED ALLOY

2021 ◽  
pp. 69-72
Author(s):  
V. G. Shmorgun ◽  
V. P. Kulevich ◽  
A. I. Bogdanov ◽  
O. V. Slautin
Keyword(s):  
Welded Joints ◽  
Structure And Properties ◽  
Aluminum Iron ◽  
Iron Based ◽  
Melted Metal

The influence of the composition of iron-based alloys on the microhardness of the areas of the melted metal in explosion-welded joints with aluminum is investigated. It is shown that, other things being equal, the presence of chromium in the composition of an iron-based alloy leads to an increase in the hardness of the alloys by 1-2 GPa, and joint alloying with chromium and nickel, by 3 GPa.

Influence of low-temperature tempering on structure and properties of welded joints of high-strength steel 30Kh2N2MF

2020 ◽  
Vol 2020 (6) ◽  
pp. 20-26
Author(s):  
O.A. Gaivoronskyi ◽  
◽  
V.D. Poznyakov ◽  
O.M. Berdnikova ◽  
T.O. Alekseenko ◽  
...  
Keyword(s):  
Low Temperature ◽  
Welded Joints ◽  
High Strength Steel ◽  
High Strength ◽  
Structure And Properties

scholarly journals Structure and Properties of Welded Joints of 7CrMoVTiB10-10 (T24) Steel

2018 ◽  
Vol 18 (1) ◽  
pp. 37-47 ◽  
Author(s):  
K. Pańcikiewicz
Keyword(s):  
Welded Joints ◽  
Filler Metal ◽  
Coefficient Of Thermal Expansion ◽  
Rupture Strength ◽  
Quality Level ◽  
Structure And Properties ◽  
Creep Rupture Strength ◽  
Standard Requirement ◽  
Gas Tungsten Arc ◽  
Filler Metals

AbstractGas Tungsten Arc butt welded joints of tubes of 7CrMoVTiB10-10 made using bainitic-martensitic P 24-IG filler metal were found to be susceptible to root cracking. This was avoided by using the CMS-IG filler metal and austenitic EPRI P87 filler metal. Detailed coefficient of thermal expansion analysis for both filler metals was performed. Unfortunately, CMS-IG filler metal is characterized by a lower creep rupture strength than P 24-IG. For this reason, the joints were produced by the 141 method with using two filler metals: P 24- IG and EPRI P87. All the welded joints was characterized by the B quality level. Macrostructural, microstructural and hardness data for both welded joints are presented. The standard requirement, < 350 HV10, was marginally not met and was achieved through post weld heat treatment.

scholarly journals The Effect of Nanometric α-Al2O3 Addition on Structure and Mechanical Properties of Feal Alloys Fabricated by Lens Technique

2017 ◽  
Vol 62 (3) ◽  
pp. 1703-1712 ◽  
Author(s):  
M. Łazińska ◽  
T. Durejko ◽  
W. Polkowski
Keyword(s):  
Mechanical Properties ◽  
Grain Size ◽  
Intermetallic Alloy ◽  
First Principle ◽  
Metal Pool ◽  
Structure And Properties ◽  
Indirect Methods ◽  
Α Al2o3 ◽  
Melted Metal

AbstractResults of the first principle study on a fabrication of FeAl intermetallic based alloy with an addition of nanometric αAl2O3(n-Al2O3) particles by the LENS method and a subsequent characterization of the as received materials’ structure and properties, are shown in the present work. A series of samples were manufactured using LENS technique while a control of temperature and the size of melted metal pool. The presence of ceramics nanoparticles was not directly confirmed by microscopy observations. Neither aluminum nor oxygen content was not elevated in the material with n-Al2O3content. Although, indirect methods revealed influence of n-Al2O3addition on the manufactured elements structure. Analyses of porosity has shown that addition of 2% vol. n-Al2O3significantly decreases this feature (~1%), as compared to the reference material made of pure FeAl intermetallic alloy (~5%). The addition of n-Al2O3causes an increase of grain size in Fe40Al intermetallic alloy. An oxidation resistance has been also improved what was associated to the n-Al2O3addition. Four times lower increase of samples mass was noticed for sample with the n-Al2O3addition as compared to the pure Fe40Al intermetallic alloy.

The structure and properties of welded joints in niobium made in a controlled helium atmosphere

1987 ◽  
Vol 1 (7) ◽  
pp. 618-620
Author(s):  
G A Petrunin ◽  
A M Lyubchik ◽  
N F Chugai ◽  
E A Asnis ◽  
M M Nerodenko
Keyword(s):  
Welded Joints ◽  
Structure And Properties ◽  
Helium Atmosphere ◽  
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