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 ◽  
Made In

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.

Structure and Properties of Polysilsesquioxanes and Copolymers for Ultra-Low Dielectric Films

2003 ◽  
Vol 766 ◽  
Author(s):  
Do Y. Yoon ◽  
Hyun Wook Ro ◽  
Eun Su Park ◽  
Jin-Kyu Lee ◽  
Hie-Joon Kim ◽  
...  
Keyword(s):  
Copper Interconnects ◽  
Dielectric Constants ◽  
Dielectric Films ◽  
Structure And Properties ◽  
Structure Property ◽  
Detailed Structure ◽  
Low Dielectric ◽  
Structure Property Relationships ◽  
Mechanical Modulus ◽  
Made In

AbstractPolysilsesquioxanes (PSSQs) with the empirical formula (RSiO3/2)n have become very important as low-dielectric insulators for copper interconnects in the next-generation logic devices, but the detailed structure-property relationships were completely lacking. We have investigated the microstructure and functional properties of PSSQs with varying alkyl substituents and also PSSQ copolymers. As a result, significant advances have been made in the scientific understanding of PSSQ structures and significant improvements of key properties such as the crack resistance, mechanical modulus and hardness, and incorporation of nanometer-sized (<4 nm) porosity for ultra-low dielectric constants (<2.0).

scholarly journals Evaluation of pore sizes in welded joints made in various constructional materials on the basis of penetrant testing by colour method

2017 ◽  
Vol 62 (1) ◽  
pp. 19-25
Author(s):  
J. Czuchryj ◽  
P. Irek
Keyword(s):  
Welded Joints ◽  
Structural Materials ◽  
Test Results ◽  
Pore Sizes ◽  
Development Times ◽  
Test Elements ◽  
Made In ◽  
Penetrant Testing

Abstract It has been compared the dimensions of indications obtained in colour liquid-penetrant inspection. The indications arose from simulated pores drilled in test elements. The series of penetrant tests included different structural materials. On the basis of test results it has been ascertained the possibility of evaluation of the pores depth as well as it has been determined recommended development times for different constructional materials

Sign in / Sign up

Export Citation Format

Share Document