Microstructure Investigation of Radiochromic Dosimetry Films Using Positron Annihilation Lifetime Spectroscopy

Albogamy, N.T.S.; Sharshar, T.; Aydarous, A.

doi:10.9790/4861-0804020814

Our system is currently under heavy load due to increased usage. We're actively working on upgrades to improve performance. Thank you for your patience.

IOSR

2016

DOI: 10.9790/4861-0804020814

|View full text |Cite

Microstructure Investigation of Radiochromic Dosimetry Films Using Positron Annihilation Lifetime Spectroscopy

N.T.S. Albogamy¹,

T. Sharshar²,

A. Aydarous³

Abstract: Abstract:Gafchromic

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...

Citation Types

Supporting

Mentioning

Contrasting

Year Published

2018

2020

Publication Types

Select...

Article3

Relationship

Self Cite0

Independent3

Authors

Journals

Cited by 3 publications

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

Laser welding of copper‐niobium microcomposite wires for pulsed power applications

Višniakov

Mikalauskas

Černašėjus

et al. 2019

Materialwissenschaft Werkst

View full text Add to dashboard Cite

The laser welding of copper‐niobium microcomposite wires was investigated. It was determined that the joint structure does not have welding defects, while microscopic examination of the joint cross‐section showed that the microstructure of the autogenous weld consists mainly of a copper‐based solid solution strengthened by niobium‐rich precipitations. The weld obtained with use of filler material consists of two distinct zones, which are formed due to melting of filler wire and microcomposite wire. This structure of the joint provides an insignificant increase in electrical resistance and sufficient ultimate strength and plasticity of the joint. The tensile strength of the sample welded without filler material reaches 335 MPa, but such welded joints are very brittle due to very low ductility. However, an autogenous laser welding joint has about 1.6 times better ductility, and the tensile strength of the joint depends on the applied filler material and is equal to the tensile strength of this material.

show abstract

Laser welding of copper‐niobium microcomposite wires for pulsed power applications

Višniakov

Mikalauskas

Černašėjus

et al. 2019

Materialwissenschaft Werkst

View full text Add to dashboard Cite

show abstract

Interactions of the process parameters and mechanical properties of laser butt welds in thin high strength low alloy steel plates

Riofrío

Capela

Ferreira

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part L:

View full text Add to dashboard Cite

High strength low alloy steels subjected to the thermomechanical control process present excellent strength–toughness combination, high strength/weight ratio, and weldability. Therefore, they are widely used in structural components, such as pressure vessels, oil/gas transportation pipes, lifting equipment, vehicles, shipbuilding and offshore industries, and in the automotive industry where low thickness (0.8–3 mm thickness) is of great importance. Usually, these steels are welded by conventional gas metal arc welding, which creates wide heat-affected zones, large residual stresses, and distortion in the welded parts. Laser welding is nowadays an alternative process to weld high strength low alloy steel parts due to its advantages. The aim of this work is to understand the effect of process parameters on defects, weld bead geometry, microstructure, and mechanical properties, namely hardness and tensile strength. We identify the main laser welding parameters and their influence on the weld bead geometry and defects, for a 3 mm thick high strength low alloy steel welded under a maximum power of 2 kW. A cross section of the weld seam was optimized achieving a good geometry without porosity. The threshold value of the heat input to achieve complete penetration was determined for different focus diameters. The microstructure, size, and hardness of the heat-affected zone and of the fusion zone are strongly influenced by the heat input. The values of the tensile strength achieved in butt welds were close to the base metal by an appropriate selection of the laser welding parameters and the heat input.

show abstract

Multi-Pass Laser and Hybrid Laser-Arc Narrow-Gap Welding of Steel Butt Joints

Shelyagin

Khaskin

Bernatskyi

et al. 2018

MSF

View full text Add to dashboard Cite

Multi-pass laser and laser-arc narrow-gap welding make it possible to obtain high-quality butt joints of large-thickness pipe steels with hardness up to 2600...2800 MPa and toughness close to the base metal toughness at a temperature of 20°C. When multi-pass welding methods are used, the subsequent pass makes heat treatment of the previous ones, and reduces the rate of their cooling yet. This allows excluding heat treatment of the joint after welding, which significantly reduces the time and costs for manufacturing large-sized structures.

show abstract

scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.

Contact Info

hi@scite.ai

10624 S. Eastern Ave., Ste. A-614

Henderson, NV 89052, USA

Blog Terms and Conditions API Terms Privacy Policy Contact Cookie Preferences Do Not Sell or Share My Personal Information

Made with 💙 for researchers

Part of the Research Solutions Family.

Microstructure Investigation of Radiochromic Dosimetry Films Using Positron Annihilation Lifetime Spectroscopy

Abstract: Abstract:Gafchromic

Cited by 3 publications

References 16 publications

Laser welding of copper‐niobium microcomposite wires for pulsed power applications

Laser welding of copper‐niobium microcomposite wires for pulsed power applications

Interactions of the process parameters and mechanical properties of laser butt welds in thin high strength low alloy steel plates

Multi-Pass Laser and Hybrid Laser-Arc Narrow-Gap Welding of Steel Butt Joints

Contact Info

Product

Resources

About