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
The effect of copper on the microstructure and aging characteristics of an 0.8%C bainitic steel
Download
10512641.pdf
Date
2022-12-02
Author
Yıldırım, Çağatay
Metadata
Show full item record
This work is licensed under a
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
.
Item Usage Stats
386
views
153
downloads
Cite This
Copper causes hot shortness in steel. However, the 1:2 nickel-to-copper ratio avoids hot shortness phenomena. Also, it is known that an aging treatment applied to ferritic steels causes age hardening via the precipitation of Cu in the form of BCC copper-rich clusters. The latter phenomenon was studied extensively in low and medium-carbon steels. In this study, the copper precipitation in bainitic high-carbon steel and its effect on microstructure and properties are investigated. To achieve this, 0.8% C steel having 2% copper and 1% nickel was cast and isothermally heat treated at various temperatures to obtain bainite. Then the bainitic steels were aged at various temperatures and times. Copper could not suppress carbide precipitation and as a result, retained austenite phase could not be detected in bainitic structures. However, aging retards further softening of the bainite structure in comparison to martensitic specimens.
Subject Keywords
Isothermal Heat Treatment
,
Bainite
,
Copper
,
Aging
URI
https://hdl.handle.net/11511/101213
Collections
Graduate School of Natural and Applied Sciences, Thesis
Suggestions
OpenMETU
Core
The Aging characteristics of a medium carbon steel with and without copper
Uzer, Osman Emre; Ögel, Bilgehan; Department of Metallurgical and Materials Engineering (2019)
For many years, copper bearing steels’ usage in steel industry was limited by copper’s detrimental effect on hot working capability. However with the latest findings that eliminates this negative effect with the addition of nickel, copper has emerged as an alloying element option. In various studies, copper is found to precipitate in ferrite phase after aging and leads to an increase in mechanical properties such as hardness and strength while still having a good amount of ductility-strength balance. In thi...
The effect of tempering on susceptibility to stress corrosion cracking of AISI 4140 steel in 33% sodium hydroxide at 80 degrees C
Sarioglu, F (2001-09-30)
The stress corrosion cracking (SCC) behaviour of low alloy steel AISI 4140 was investigated in 33% sodium hydroxide solution at 80 degreesC under freely corroding conditions. Tempering temperatures of 450, 500, 550, 600 and 650 degreesC were used to produce a range of micro structures and strength levels. The relation between the crack growth rate and the stress intensity factor was obtained by constant displacement rate tests conducted on pre-cracked compact tension specimens. The crack growth behaviour an...
The influence of flow forming on the precipitation characteristics of Al2024 alloys
Karakaş, Aptullah; Fenercioğlu, Tevfik Ozan; Yalçınkaya, Tuncay (2021-09-15)
Aluminum alloys are heat treated for better specific strength. In certain cases, an intermediate cold work is applied between solution heat treatment and aging. In this study, a specific tube forming technique called flow forming is applied as the intermediate cold work to produce Al2024-T8 grade tubes, resulting in enhancement of mechanical properties. The correlation between the amount of cold work and final mechanical properties is studied through tensile tests, SEM and XRD. The study is concluded with a...
An Electrochemical Procedure for Copper Removal from Regenerated Pickling Solutions of Steel Plants
Karakaya, Esra; Aras, Mustafa Serdal; ERDOĞAN, METEHAN; Karagul, Sedef Cift; Ersoy, Merve Kolay; Karakaya, İshak (2018-03-15)
Pickling is the treatment of metal surfaces by removing oxide layer, rust, scale, inorganic contaminants or other impurities from ferrous metals, copper or precious metals. A strong inorganic acid such as hydrochloric acid is used for plain carbon or low alloy steel pickling. When the concentration of copper in the pickling solution exceeds about 100 mg/L, reversion may take place and randomly plating of copper onto the steel strips which causes visual incompatibility occur. Furthermore, efficiency of pickl...
Investigation of effect of colemanite addition on copper losses in matte smelting slag
Rusen, A.; Geveci, Ahmet; Topkaya, Yavuz Ali; Derin, B. (2012-04-01)
In this study, the aim was to reduce copper losses to slag in copper production by using a boron compound, called colemanite (2CaO center dot 3B(2)O(3)center dot 5H(2)O), as flux, besides silica. In order to achieve this purpose, two different matte-slag couples were used; the flash furnace matte-slag obtained from Eti Copper Inc. (EBI.) and a master matte-slag without copper produced synthetically under laboratory conditions. Chemical analyses of flash furnace slag and synthetic master slag were 0.88%Cu-36...
Citation Formats
IEEE
ACM
APA
CHICAGO
MLA
BibTeX
Ç. Yıldırım, “The effect of copper on the microstructure and aging characteristics of an 0.8%C bainitic steel,” M.S. - Master of Science, Middle East Technical University, 2022.
