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Mechanical Characteristics of Steel

Mechanical Characteristics of Steel

The mechanical characteristics of steel are assessed through various tests that evaluate its strength, toughness, and flexibility. These tests include tension, torsion, impact, bending, and hardness assessments, each providing crucial information about steel's suitability for specific applications.
The tension test is fundamental for determining tensile strength. In this test, a steel specimen is stretched using a gripping device until it breaks. The data collected during this test are used...

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Determining Tribocorrosion Rate and Wear-Corrosion Synergy of Bulk and Thin Film Aluminum Alloys

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Published on: September 11, 2018

Developing Improved Corrosion-Resistant AA5083-BN/WC Composites for Tribological Applications.

Hany R Ammar¹, Elsayed M Sherif², Subbarayan Sivasankaran¹

¹Department of Mechanical Engineering, College of Engineering, Qassim University, Buraydah 51452, Saudi Arabia.

Materials (Basel, Switzerland)

|February 25, 2023

Summary

Corrosion-resistant AA5083-BN/WC composites were developed. Increasing tungsten carbide (WC) and boron nitride (BN) content enhanced corrosion resistance and reduced pitting in 3.5% NaCl solution.

Keywords:

AA5083-matrix composite boron nitride (BN)chloride solutions corrosion passivation electrochemical methods tungsten carbide (WC)

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Published on: September 23, 2018

Area of Science:

Materials Science
Corrosion Engineering
Tribology

Background:

AA5083 aluminum alloy is a common matrix material.
Tribological applications require enhanced corrosion resistance.
Tungsten carbide (WC) and boron nitride (BN) are potential reinforcements.

Purpose of the Study:

To develop corrosion-resistant AA5083-BN/WC composites.
To investigate the effect of WC and BN content on corrosion behavior.
To evaluate composite performance in 3.5% NaCl solution.

Main Methods:

Fabrication of AA5083 composites with varying WC and BN content (6% and 12%).
Electrochemical corrosion testing: Cyclic Potentiodynamic Polarization (CPP), Chronoamperometric Current Time (CCT), and Electrochemical Impedance Spectroscopy (EIS).
Analysis of corrosion resistance (Rp) and pitting corrosion.

Main Results:

Addition of WC and BN significantly improved the corrosion resistance (Rp) of AA5083 composites.
Corrosion resistance increased with higher WC and BN content (6% to 12%).
WC and BN additions effectively reduced pitting corrosion in 3.5% NaCl solution.

Conclusions:

AA5083-BN/WC composites exhibit excellent corrosion resistance for tribological applications.
Optimized reinforcement content (12% WC and 12% BN) provides maximum corrosion protection.
The study confirms the protective role of WC and BN against corrosion in AA5083 composites.