Show/Hide Menu
Hide/Show Apps
Logout
Türkçe
Türkçe
Search
Search
Login
Login
OpenMETU
OpenMETU
About
About
Open Science Policy
Open Science Policy
Open Access Guideline
Open Access Guideline
Postgraduate Thesis Guideline
Postgraduate Thesis Guideline
Communities & Collections
Communities & Collections
Help
Help
Frequently Asked Questions
Frequently Asked Questions
Guides
Guides
Thesis submission
Thesis submission
MS without thesis term project submission
MS without thesis term project submission
Publication submission with DOI
Publication submission with DOI
Publication submission
Publication submission
Supporting Information
Supporting Information
General Information
General Information
Copyright, Embargo and License
Copyright, Embargo and License
Contact us
Contact us
Effect of friction stir processing on fracture toughness and crack growth behaviour of fusion welded 5083 grade aluminum plates
Download
index.pdf
Date
2015
Author
Akçay, Günseli
Metadata
Show full item record
Item Usage Stats
341
views
134
downloads
Cite This
The purpose was to investigate the effects of post-weld friction stir processing (FSP) on the microstructure and fatigue crack propagation in Aluminum Alloy 5083 H111 weldments. As preliminary study, optimization trials were done in order to decide the type, rotational speed, and travel speed of the FSP tool. Microstructural examinations, hardness and tensile tests were done on as-processed materials. In the second part of the work, FSP was applied on the weld zone of the 5083 H111 plates that were joined by gas metal arc welding and a series of samples were prepared. Tensile, hardness, fracture toughness and fatigue crack propagation tests were carried out on the samples prepared from the base metal, weld metal and FSPed weld metal. Microstructures and fracture surfaces of the samples were investigated by optical microscope and scanning electron microscope. Some improvements in hardness, tensile and fracture properties in the weldment were obtained after FSP, and the results were compared and discussed to explain the reasons and main mechanisms.
Subject Keywords
Aluminum.
,
Metals
,
Friction materials.
,
Friction stir welding.
,
Gas metal arc welding.
URI
http://etd.lib.metu.edu.tr/upload/12618992/index.pdf
https://hdl.handle.net/11511/24978
Collections
Graduate School of Natural and Applied Sciences, Thesis
Suggestions
OpenMETU
Core
Effect of swaging on microstructure and tensile properties of W-Ni-Fe alloys
DURLU, NURİ; Caliskan, N. Kaan; Bor, Sakir (Elsevier BV, 2014-01-01)
The objective of this study was to investigate the effect of swaging on the microstructure and tensile properties of high density two phase alloys 90W-7Ni-3Fe and 93W-4.9Ni-2.1Fe. Samples were liquid phase sintered under hydrogen and argon at 1480 degrees C for 30 min and then 15% cold rotary swaged. Measurement of microstructural parameters in the sintered and swaged samples showed that swaging slightly increased tungsten grain size in the longitudinal direction and slightly decreased tungsten grain size i...
Effects of chromic acid anodizing on fatigue behavior of 7050 T7451 aluminum alloy
Ilhan, Cagri; Gürbüz, Rıza (2021-09-01)
The effect of chromic acid anodizing (CAA) surface treatment on 7050 T7451 aluminum alloy was presented in this study in terms of fatigue behavior. CAA is a treatment against corrosion by producing aluminum oxide layer (Al2O3) at the surface. However, fatigue performance of 7050 T7451 is affected by the coating. In this study, eight different CAA processes were examined with regard to etching stage of pre-treatments by using an alkaline etchant and/or acid etchants with various immersion times. Optical micr...
Effect of expandable graphite on flame retardant, thermal and mechanical properties of thermoplastic polyurethane composites filled with huntite&hydromagnesite mineral
Guler, Turkan; Tayfun, Umit; Bayramlı, Erdal; DOĞAN, Mehmet (2017-01-10)
The effect of expandable graphite (EG) was studied on the flame retardant, thermal and mechanical properties of thermoplastic polyurethane (TPU) containing huntite&hydromagnesite (HH). According to the flammability tests results, the synergistic interaction was observed between HH and EG. The maximum limiting oxygen index (LOI value was observed at a ratio of 1:1 (HH:EG) and the highest vertical burning test (UL-94) rating of V0 was observed at a ratios of 4:1, 3:2 and 1:1. The synergistic interaction betwe...
Effect of Carbon Black and/or Elastomer on Thermoplastic Elastomer-based Blends and Composites
Yaşar, Mehmet Soner; Bayram, Göknur (2014-06-12)
It was aimed to investigate the effect of carbon black and/or elastomer on the electrical conductivity and mechanical properties of thermoplastic elastomer (TPE). Carbon black (CB) and ethylene-glycidyl methacrylate (E-GMA) were used as additives in the main matrix. The blends and composites were characterized in terms of their electrical conductivity and mechanical properties. CB concentration was varied as 0.5, 1, 3 and 5 wt.%. In order to modify the surface of CB, paraffinic oil and silane coupling agent...
Effects of SiC particulates on the fatigue behaviour of an Al-alloy matrix composite
Kaynak, Cevdet (2006-01-01)
In this study, the fatigue behaviour of aluminium matrix-silicon carbide (SiC) particulate reinforced composite specimens was investigated in comparison to the matrix aluminium alloy containing 12 wt% Si. Three different weight percentages of SiC particulates: 5, 10, and 15 in the size range of 40-60 gm were injected into the melt. Mg was also added to improve the wettability of Al-alloy matrix over SiC particulates resulting in better interfacial bonding. Test specimens were machined from squeeze casting b...
Citation Formats
IEEE
ACM
APA
CHICAGO
MLA
BibTeX
G. Akçay, “Effect of friction stir processing on fracture toughness and crack growth behaviour of fusion welded 5083 grade aluminum plates,” M.S. - Master of Science, Middle East Technical University, 2015.
