Bilgilendirme: Kurulum ve veri kapsamındaki çalışmalar devam etmektedir. Göstereceğiniz anlayış için teşekkür ederiz.
 

Karakaş, Mustafa Serdar

Profile Picture
Profile URL
https://hdl.handle.net/20.500.12416/9389
Name Variants
Karakas, Mustafa Serdar
Job Title
Doç. Dr.
Email Address
Main Affiliation
06.07. Malzeme Bilimi ve Mühendisliği
Malzeme Bilimi ve Mühendisliği
06. Mühendislik Fakültesi
01. Çankaya Üniversitesi
Status
Former Staff
Website
ORCID ID
Scopus Author ID
Turkish CoHE Profile ID
Google Scholar ID
WoS Researcher ID

Sustainable Development Goals

SDG data is not available
This researcher does not have a Scopus ID.
This researcher does not have a WoS ID.
Scholarly Output

4

Articles

4

Views / Downloads

16/0

Supervised MSc Theses

0

Supervised PhD Theses

0

WoS Citation Count

58

Scopus Citation Count

60

WoS h-index

2

Scopus h-index

2

Patents

0

Projects

0

WoS Citations per Publication

14.50

Scopus Citations per Publication

15.00

Open Access Source

2

Supervised Theses

0

Google Analytics Visitor Traffic

JournalCount
Nuclear Technology and Radiation Protection1
Surface and Coatings Technology1
Zeitschrift für Naturforschung A1
Current Page: 1 / 1

Scopus Quartile Distribution

Competency Cloud

GCRIS Competency Cloud

Filters

2014 - 20174
Reset filters

Settings

Scholarly Output Search Results

Now showing 1 - 4 of 4
  • Thumbnail Image
    Article
    Citation - WoS: 1
    Citation - Scopus: 1
    Boriding of Binary Ni-Ti Shape Memory Alloys
    (Walter de Gruyter Gmbh, 2016) Dogan, Sule; Karakas, Mustafa Serdar; Calik, Adnan; Ucar, Nazim
    Boriding of binary Ni-Ti shape memory alloys was carried out in a solid medium at 1273 K for 2, 4, 6, and 8 h using the powder pack method with proprietary Ekabor-Ni powders. Characterization of the boride layer formed on the surface of alloys was done by optical microscopy and scanning electron microscopy. The presence of boride, silicide, and borosilicide phases in the boride layers was confirmed by X-ray diffraction analysis. The thickness and microhardness of the boride layers increased with increasing boriding time. Hardness profiles showed a rapid decrease in hardness moving from the boride layer to the main structure. The high hardness of the boride layer was attributed mainly to the formation of TiB2. A parabolic relationship was observed between layer thickness and boriding time, and the growth rate constant for the boriding treatment was calculated as 0.62 x 10(-8) cm(2) s(-1). .
  • Thumbnail Image
    Article
    Citation - WoS: 7
    Citation - Scopus: 7
    A Comparison of Radiation Shielding of Stainless Steel With Different Magnetic Properties
    (Vinca inst Nuclear Sci, 2014) Akbunar, Sahin; Ucar, Nazim; Yilmaz, Nihat; Karakas, Mustafa Serdar; Akkurt, Iskender; Calik, Adnan
    The radiation shielding properties of three different stainless steels have been investigated. For this purpose, linear attenuation coefficients at photon energy levels of 662 keV and 1250 keV have been measured. The obtained results showed that ferritic stainless steel was more capable in stopping the high energy photons than its non-magnetic counterpart.
  • Thumbnail Image
    Article
    Citation - WoS: 49
    Citation - Scopus: 52
    Effect of Borotitanizing on Microstructure and Wear Behavior of Inconel 625
    (Elsevier Science Sa, 2017) Karakas, Mustafa Serdar; Gok, Mustafa Sabri; Kucuk, Yilmaz; Demir, Mehmet; Kanca, Erdogan; Cakir, Huseyin; Gunen, Ali
    Inconel 625, a nickel-based superalloy, is used in a wide range of applications including the marine and petroleum industries under where it is subjected to harsh conditions such as high temperatures and highly corrosive environments. However, its wear resistance is limited and can be often considered unsatisfactory in some applications. If this alloy were to be used under abrasive wear conditions, its surface would have to be protected by a wear resistant coating. In this study, a two-step thermo-chemical borotitanizing treatment (including an initial boriding step followed by titanium diffusion) is proposed. Microstructural characterization (optical microscopy, scanning electron microscopy, energy dispersive spectroscopy and X-ray diffraction) and mechanical properties (induding micro-hardness and micro-abrasion wear) of the coated samples were conducted. Microstructural studies revealed a compact, homogenous, silicide-free coating, consisting of four distinct regions: a TiB2 layer, a multi-phase boride layer, a diffusion zone and the substrate. Hardness values were significantly higher than those obtained by standard boriding treatments. Due to the nano-sized bodding agents used, the coatings formed on the surface were thicker than coatings obtained by methods such as nitriding, paste bodding and pack-boriding, and comparable to that of laser boriding. The wear resistance was improved by up to ten times in comparison with untreated Inconel 625. Grooving was the effective wear mechanism in untreated Inconel 625. How-ever the increase in surface hardness achieved by the borotitanizing treatment changed the wear mechanism in the coated samples from grooving to rolling. (C) 2016 Elsevier B.V. All rights reserved.
  • Thumbnail Image
    Article
    Citation - WoS: 1
    Effect of Nickel Content on the Boronising Behaviour of Permalloys
    (Scibulcom Ltd, 2015) Ucar, N.; Karakaş, Mustafa Serdar; Iyi, O.; Uçar, Nuri; Calik, A.; Karakas, M. S.; Malzeme Bilimi ve Mühendisliği; Bankacılık ve Finans
    Permalloys with nickel contents ranging from 60 to 90% were boronised in a solid medium using the powder pack method. In this method, commercial Ekabor-II powders were thoroughly mixed with ferro-silicon powders to form the boronising medium. The samples were boronised in an electrical resistance furnace for 5 h at 1173 K under atmospheric pressure. The results showed that borosilicide and boride layers were formed on the surface of boronised permalloys, with average hardness of 900-1000 HV0.1. The average thickness of the multilayer coating was 90 mu m, and did not show significant change with Ni content within the range studied. The saw-tooth morphology of the boride layers were smoothened with increasing nickel content.