Journal of Advanced Materials and Technologies

Journal of Advanced Materials and Technologies

The Effect of the Number of Passes on the Microstructure and Mechanical Properties of Ti/CNTs Surface Nanocomposite Produced by the Friction Stir Processing (FSP)

Document Type : Original Reaearch Article

Authors
Mojtaba Hakakzade 1
Hamid Reza Jafarian 2
Ali Reza Eivani 2
Seyed Hossein Seyedein 2
1 MSc Student School of Metallurgy & Materials Engineering, Iran University of Science and Technology, Tehran, Iran.
2 Associate Professor, School of Metallurgy & Materials Engineering, Iran University of Science and Technology, Tehran, Iran.
10.30501/jamt.2025.486560.1311
Abstract
In this research, Carbon Nanotubes (CNTs) were incorporated into pure titanium to create a surface nanocomposite using Friction Stir Processing (FSP) method. Initially, through various experiments, the desired linear and rotational speeds were established (ω=300 rpm, v=180 mm/min). Subsequently, different process passes were conducted on pure titanium and the surface composite, which was fabricated using a fixed volume percentage of 3.8% carbon nanotubes. The effect of this variable on the mechanical properties and microstructure of both pure titanium and the surface composite was then investigated. The results showed that the optimal ultimate tensile strength and hardness for the surface composite were achieved in the second pass, with values increasing to 512 MPa and 265 Hv, respectively. In contrast, the ultimate tensile strength and hardness of pure titanium were measured at 390 MPa and 45 Hv, respectively. The findings indicated that friction stir processing did not have a noticeable effect on the mechanical properties of pure titanium.
Keywords
Friction Stir Welding Process
Carbon Nanotube
Twinning
Surface Nano-composite
Mechanical Properties
Subjects
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  • Receive Date 03 November 2024
  • Revise Date 05 January 2025
  • Accept Date 05 March 2025