Investigating the formation of intermetallic compounds during friction stir welding of magnesium alloy to aluminum alloy in air and under liquid nitrogen

Date

2014-03-01

Author

Mofid, M. A.
Abdollah-zadeh, A.
Gür, Cemil Hakan

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

276
views

0
downloads

This research demonstrates the use of submerged friction stir welding under liquid nitrogen as an alternative and improved method for creating fine-grained welds, and hence, to alleviate formation of intermetallic phases. Magnesium alloy and aluminum alloy were joined by friction stir welding in two environments, namely air and liquid nitrogen, with 400 rpm rotation and 50 mm/min travel speed. The temperature profile, microstructure, scanning electron microscope energy dispersive X-ray spectroscopy analysis and hardness were evaluated. In the stir zone of air-welded specimen, formation of brittle intermetallic compounds causes the weld to crack. These phases were formed because of constitutional liquation. The stir zone of under liquid nitrogen-welded specimen showed that formation of intermetallic compounds is suppressed significantly because of lower heat input.

Subject Keywords

Control and Systems Engineering, Mechanical Engineering, Industrial and Manufacturing Engineering, Software, Computer Science Applications

URI

https://hdl.handle.net/11511/39278

Journal

INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY

DOI

https://doi.org/10.1007/s00170-013-5565-x

Collections

Department of Metallurgical and Materials Engineering, Article

Suggestions

OpenMETU
Core

Development of property equations for butane and isobutane – preliminary design of household refrigeration cycle Cüylan, Gökhan; Oskay, Rüknettin; Department of Mechanical Engineering (2009) This study aims to simulate a vapor compression refrigeration cycle, working with either butane (R-600) or isobutane (R-600a). For this purpose a computer program is written to design a household refrigerator, by modeling a steady-state, vapor compression cycle, with user defined input data. Each refrigerator component can be designed separately, as well as parts of a single refrigeration system in the program. In order to determine the refrigerant thermophysical properties at different states, least square...
Thermal history and microstructure during friction stir welding of Al-Mg alloy Sheikh-Ahmad, J. Y.; Ozturk, F.; Jarrar, F.; Evis, Zafer (Springer Science and Business Media LLC, 2016-09-01) In this study, a commercial aluminum-magnesium alloy was friction stir welded (FSW) at a constant rotational speed of 1016 rpm and different welding speeds from 50 to 400 mm/min. Temporal thermal histories of the process were recorded at different locations from the weld line and transformed to spatial temperature distribution near the weld line. Tensile and microhardness measurements were also performed and the microstructure in the weld zone was investigated. Results of this revealed that an increase in w...
Investigation of combustion process through horizontal wells Bağcı, Ali Suat (Informa UK Limited, 2005-04-15) Dry combustion was accomplished with the application of different horizontal well configurations in a 3-D model using high gravity oil. Seven experiments using Raman crude oil (18 degrees API) were carried out in the laboratory with a 40 cm square 3-D model having a thickness of 15 cm. Five different well configurations were applied to recover Raman crude oil. The model was packed by tamping a mixture of crushed limestone, water and crude oil. A total of 36 thermocouples were used at the top, center and bot...
A Mathematical Model for Simulation of Flow Rate and Chamber Pressures in Spool Valves Afatsun, Ahmet C.; Balkan, Raif Tuna (ASME International, 2019-02-01) In this paper, a mathematical model to simulate the pressure and flow rate characteristics of a spool valve is derived. To improve the simulation accuracy, the discharge coefficient through the spool valve ports is assumed to be a function of both the Reynolds number and the orifice geometry rather than treating it as a constant. Parameters of the model are determined using the data obtained by computational fluid dynamics (CFD) analyses conducted on two-dimensional axisymmetric domains using ANSYS FLUENT 1...
Analysis of regenerative cooling ın liquid propellant rocket engines Boysan, Mustafa Emre; Ulaş, Abdullah; Department of Mechanical Engineering (2008) High combustion temperatures and long operation durations require the use of cooling techniques in liquid propellant rocket engines. For high-pressure and high-thrust rocket engines, regenerative cooling is the most preferred cooling method. In regenerative cooling, a coolant flows through passages formed either by constructing the chamber liner from tubes or by milling channels in a solid liner. Traditionally, approximately square cross sectional channels have been used. However, recent studies have shown ...

Citation Formats

M. A. Mofid, A. Abdollah-zadeh, and C. H. Gür, “Investigating the formation of intermetallic compounds during friction stir welding of magnesium alloy to aluminum alloy in air and under liquid nitrogen,” INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY, pp. 1493–1499, 2014, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/39278.