Development of structural titanium alloys for marine applications

Williams, W. Lee

doi:10.1016/0029-8018(69)90009-2

Cited by 14 publications

(9 citation statements)

References 3 publications

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“…The cavitations and erosion resistance make titanium a perfect metal for pumps, heat exchangers and seawater piping. 41 Heat transfer efficiency and heat transfer properties of titanium in service circumstances are fairly accurate to those of admiralty copper-nickel and brass. Although titanium and its alloys have a low coefficient of thermal conductivity, the reasons behind good heat transfer efficiency are as follows: higher strength of titanium permits the use of thin-walled equipment, less corrosion in seawater and oxide layer 42,43 makes the surface for enhanced heat transfer and better erosion resistance allows considerably high service velocities.…”

Section: Titanium and Its Alloysmentioning

confidence: 91%

A critical appraisal of laser peening and its impact on hydrogen embrittlement of titanium alloys

Rajyalakshmi

Swaroop

2019

Proceedings of the Institution of Mechanical Engineers, Part B:

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Many efforts have been made to understand the effects of hydrogen on titanium alloys, resulting in an abundance of theoretical models and papers. Titanium alloys are crucial advanced materials that provide an excellent combination of a high strength-to-weight ratio and good corrosion behaviour even though they are reasonable to corrosion attack. Titanium alloys are susceptible to hydrogen embrittlement when comes into contact with hydrogen, and galvanic pair with an active metal current, or the pH is greater than 12 or less than 3 or an impressed current. In view of the fact that hydrogen behaves differently with α and β phases, hydrogen degradation may vary markedly in titanium alloys. Hydrogen diminishes the corrosion and erosion resistance and fatigue life of in-service titanium components. A laser peening or laser shock peening is a novel technique for making the metal surfaces and sub-layers densify. It evokes that laser shock peening adoption results in yielding and plastic deformation, thereby creating high compressive residual stresses extending below the surface of the material which is desirable for hydrogen embrittlement resistance and reduction of crack initiation and growth of the component. This article is a review of information relating hydrogen embrittlement of titanium alloys and surface modification technique which influence the strength potential of titanium alloys.

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Section: Titanium and Its Alloysmentioning

confidence: 91%

A critical appraisal of laser peening and its impact on hydrogen embrittlement of titanium alloys

Rajyalakshmi

Swaroop

2019

Proceedings of the Institution of Mechanical Engineers, Part B:

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“…Generally, the materials for marine equipment should satisfy several factors, including high strength, high corrosion resistance in the extracted products of crude oil, and repair with no need of post-welding heat treatment in the sea conditions. [127] As Ti alloys have such required properties, they are also important for marine constructions and used for heat exchanger, hull structures of deep-water equipment, high-pressure vessels, fireextinguishing systems, etc. [15] Grade 5 (Ti-6Al-4V) and Grade 23 (Ti-6Al-4V ELI, improved by decreasing the contents of interstitial impurities compared with Ti-6Al-4V) are the most commonly used to construct marine objects.…”

Section: Various Applications Of Ti and Ti Alloysmentioning

confidence: 99%

“…[15] Grade 5 (Ti-6Al-4V) and Grade 23 (Ti-6Al-4V ELI, improved by decreasing the contents of interstitial impurities compared with Ti-6Al-4V) are the most commonly used to construct marine objects. [127] PT-3V, 5V, and 37 alloys (Ti-Al-V series pseudo-α Ti alloys) also meet the requirements for marine constructions. [15] Furthermore, due to their combination of physical and chemical properties, Ti and Ti alloys are actively used in many other industries, such as electroplating industry, automobile industry, construction industry, sports equipment, and so on.…”

Section: Various Applications Of Ti and Ti Alloysmentioning

confidence: 99%

“…As Ti alloys have such required properties, they are also important for marine constructions and used for heat exchanger, hull structures of deep‐water equipment, high‐pressure vessels, fire‐extinguishing systems, etc . Grade 5 (Ti–6Al–4V) and Grade 23 (Ti–6Al–4V ELI, improved by decreasing the contents of interstitial impurities compared with Ti–6Al–4V) are the most commonly used to construct marine objects . PT–3V, 5V, and 37 alloys (Ti–Al–V series pseudo‐α Ti alloys) also meet the requirements for marine constructions .…”

Section: Introductionmentioning

confidence: 99%

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Surface Modification of Titanium and Titanium Alloys: Technologies, Developments, and Future Interests

2020

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Thanks to a considerable number of fascinating properties, titanium (Ti) and Ti alloys play important roles in a variety of industrial sectors. However, Ti and Ti alloys could not satisfy all industrial requirements; the degradation of Ti and Ti alloys always commences on their surfaces in service, which declines the performances of Ti workpieces. Therefore, with aim to further improve their mechanical, corrosion and biological properties, surface modification is often required for Ti and Ti alloys. This article reviews the technologies and recent developments of surface-modification methods with respect to Ti and Ti alloys, including mechanical, physical, chemical, and biochemical technologies. Conventional methods have limited improvement in the properties and/or restriction on the geometry of workpieces. Therefore, many advanced surfacemodification technologies have emerged in recent decades. New methods make Ti and Ti alloys have better performance and extended applications. With requirement of high surface properties in future. Understanding the mechanism in various surface-modification methods, combining the advantages of current technologies and developing new coating materials with high performance are required urgently. As such, incorporation of different surface-modification technologies with high-performance modified layers may be the mainstream of surface modifications for Ti and Ti alloys. . His current research interests focus on the metal additive manufacturing (e.g., selective laser melting, electron beam melting), titanium alloys and composites, and processing-microstructureproperties in high-performance materials.

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“…Corrosion potentials, corrosion current densities, and high-potential passive current densities of the Ti-6Al-4V ELI, Ti-35Nb-7Zr-5Ta, Ti-13Mo-7Zr-3Fe (as-received α + β), and Ti-13Mo-7Zr-3Fe (metastable β) alloys in Ringer's solution at 37 • C after 1-h immersion [222]. Generally, Cl − is presented in a variety of environments, such as the human body, marine, coast environment, and chemical environment [223][224][225]. Cl − ions are aggressive ions in the corrosive environments, which can damage the passive film formed on many metallic components [226][227][228].…”

Section: Corrosion Behaviormentioning

confidence: 99%

Recent Development in Beta Titanium Alloys for Biomedical Applications

Chen

Cui

Zhang

2020

Metals

206

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β-type titanium (Ti) alloys have attracted a lot of attention as novel biomedical materials in the past decades due to their low elastic moduli and good biocompatibility. This article provides a broad and extensive review of β-type Ti alloys in terms of alloy design, preparation methods, mechanical properties, corrosion behavior, and biocompatibility. After briefly introducing the development of Ti and Ti alloys for biomedical applications, this article reviews the design of β-type Ti alloys from the perspective of the molybdenum equivalency (Moeq) method and DV-Xα molecular orbital method. Based on these methods, a considerable number of β-type Ti alloys are developed. Although β-type Ti alloys have lower elastic moduli compared with other types of Ti alloys, they still possess higher elastic moduli than human bones. Therefore, porous β-type Ti alloys with declined elastic modulus have been developed by some preparation methods, such as powder metallurgy, additive manufacture and so on. As reviewed, β-type Ti alloys have comparable or even better mechanical properties, corrosion behavior, and biocompatibility compared with other types of Ti alloys. Hence, β-type Ti alloys are the more suitable materials used as implant materials. However, there are still some problems with β-type Ti alloys, such as biological inertness. As such, summarizing the findings from the current literature, suggestions forβ-type Ti alloys with bioactive coatings are proposed for the future development.

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Development of structural titanium alloys for marine applications

Cited by 14 publications

References 3 publications

A critical appraisal of laser peening and its impact on hydrogen embrittlement of titanium alloys

A critical appraisal of laser peening and its impact on hydrogen embrittlement of titanium alloys

Surface Modification of Titanium and Titanium Alloys: Technologies, Developments, and Future Interests

Recent Development in Beta Titanium Alloys for Biomedical Applications

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