ME 4133/6133 Mechanical Metallurgy

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Description

Titanium alloy Ti-6Al-4V was chosen for examination, more specifically, the Properties and Performance of the alloy. The students will share the responsibility of examining the attributes of the material. The team members participate evenly in performing research, producing calculations, and constructing the final report. Contained herein is the information gathered through research conducted thus far.

The performance of the material will be related to the processing methods of the material. This relationship forms the basis of cost analysis. The students will examine the atomic characteristics and crystalline structure to determine the effects of the alloyed materials on properties such as yield strength and strain. The alloy is to be compared to similar materials (alloys; pure titanium) to determine the influence of the specific interstitial elements on the properties of the material. The selected alloy is used in multiple industries and applications due to its innate properties, performance, and the cost to benefit ratio. The cost of titanium increases production cost versus traditional steels, but titanium’s strength and weight reduction make it more appealing in high performance applications. Industries that both use and benefit from this alloy include the following: aerospace, marine, power generation, offshore oil, and medical. In the aerospace field, titanium alloys offer lighter weight alternatives to steel alloys, and this titanium alloy is often used alongside steel alloys without the fear of galvanic corrosion from elevated levels of dissimilarity. The alloy is also beneficial in the marine and offshore oil industries due to its corrosion resistance; the alloy does not react significantly with salt water and therefore will last vastly longer in these applications compared to steel. This property stems from the tendency of titanium, and aluminum, to form a thin coating of its own oxides as a protective layer against further corrosion. Corrosion rates of Ti-6Al-4V for specific applications appear in Figure 1. In the power generation industry, power turbines cycle for extended periods of time under considerable loads; therefore, titanium’s fatigue resistance and low thermal conductivity provide strength and longevity in common steam turbine blades. Innovative prostheses use titanium as a lightweight framework capable of resisting cyclic loading induced by everyday motion. Due to its high performance and “corrosion proof” properties, the material is bio-compatible, meaning that it can be used in the human body with no adverse effects; it has an innate ability to join with human bone. Some other medical implementations include the following: spinal fusion cages, maxi-facial prosthetics, pins, screws, bone plates, rods, wire, expandable rib cages, posts, and finger and toe replacements. This research provides students with a greater understanding of titanium’s uses under engineering considerations in industrial applications in accordance with the principles learned in Mechanical Metallurgy at Mississippi State University.

Disciplines

Materials Science and Engineering | Mechanical Engineering | Metallurgy

College

James Worth Bagley College of Engineering

Department

Department of Mechanical Engineering

Analysis of Titanium alloy Ti-6Al-4V

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