Search Results for fatigue resistant plates

This datasheet provides information on composition limits for aluminum alloy 7255, with emphasis on the minimum static properties of aluminum alloy 7255 plate and fracture toughness of aluminum alloy 7255-T7751. Fatigue crack growth resistance of alloy 7255 plate is compared with those of legacy alloy 7055 plate.

Alloy 2099 is a third-generation Al-Cu-Li alloy providing an improved combination of strength, elastic modulus, and fatigue crack growth resistance. This datasheet provides information on its key alloy metallurgy and the effects of processing on its mechanical properties.

Alloy 2624 was developed by Alcoa as a plate product to replace alloy 2024 and 2324 in applications requiring moderate or high strength and the highest levels of damage tolerance. This datasheet provides information on composition limits, processing effects on physical and mechanical properties, and applications of this alloy. Figures provide comparisons of plane stress R-curves of 2624 with 2024-T351 and 2324-T39 and fatigue crack growth resistance of 2624 with 2024-T351 and 2324-T39.

Alloy 7097 is a quench insensitive Al-Mg-Zn-Cu-Zr alloy engineered for the most advantageous combination of strength, corrosion resistance, and fracture toughness in thick structural applications. This datasheet provides information on key alloy metallurgy of alloy 7097 and processing effects on mechanical properties of alloy 7097-T7651 plate.

This datasheet provides information on composition limits, fabrication characteristics, processing effects on physical and mechanical properties, and application performance of thick plate and forging alloy 7085. It presents the specified minimum strength and fracture properties for plate, die, and hand forgings. The datasheet provides a comparison of the strength, fracture toughness, and fatigue crack growth resistance of alloy 7085 plate with those of the legacy plate alloy 7050. It shows tensile yield and ultimate strength at elevated temperature for various temperatures and exposure times for 7085-T7452 die forgings.

This article examines the factors influencing the fatigue behavior of an individual weldment, using extensive experimental data and a computer model, which simulates the fatigue resistance of weldments. It discusses the process of fatigue in weldments. The service conditions, which favor long crack growth and the conditions, which favor crack nucleation are contrasted. The article presents experimental data, which is used to show the effect of weldment geometry on fatigue resistance. Several useful geometry classification systems are compared. The article analyzes a computer model, which is employed to investigate the behavior of two hypothetical weldments, namely, a discontinuity-containing weldment and a discontinuity-free weldment.

This datasheet provides information on key alloy metallurgy and applications of Alclad 2029. It contains tables that present statistically determined mechanical property minimums for Alclad 2029-T8 sheet and plate. The plane stress fracture toughness and fatigue crack growth resistance of alloys 2029 and 2024 are illustrated.

This datasheet provides information on composition limits, processing effects on mechanical properties, and applications of alloy 2524. A comparison of strength minimums and typical damage tolerance properties for Alclad 2524-T3 with Alclad 2024-T3 plate is also provided.

This article provides an overview of fatigue and fracture resistance of aluminum alloys. It discusses the characteristics of aluminum alloy classes and the fracture mechanics of aluminum alloys. The article tabulates relative stress-corrosion cracking ratings for high-strength wrought aluminum products. It analyzes the selection of various alloys for stress-corrosion cracking resistance, including aluminum-lithium alloys, copper-free 7XXX alloys, and casting alloys. The article presents a list of typical tensile properties and fatigue limit of aluminum alloys. It also describes the effects of composition, microstructure, thermal treatments, and processing in fatigue crack growth of aluminum alloys.

Alloys 2297 and 2397 were developed for thick plate integral structures. This datasheet provides information on composition limits of these 2xxx series alloys and processing effects on mechanical properties of alloy 2297-T87 plate. A figure provides a performance comparison of 2297-T87 and 2124-T851 plates.

Cr-Mo steels are preferred in the construction of high-temperature components because they possess excellent strength, toughness, and corrosion resistance relative to carbon steels and most low-alloy steels. This article discusses the composition and metallurgy of the heat-resistant Cr-Mo steels. It details the Charpy V-notch (CVN) toughness properties of Cr-Mo steels relevant to fatigue and fracture resistance. The fracture mechanics of Cr-Mo steels are reviewed. The article analyzes the characterization of low-cycle fatigue based on fatigue damage calculations. It concludes with information on fatigue crack growth and fatigue behavior of weldments.

A sliding bearing (plain bearing) is a machine element designed to transmit loads or reaction forces to a shaft that rotates relative to the bearing. This article explains the role of wear damage mechanisms in the design and selection of bearing materials, and its relationship with bearing material properties. Sliding bearings are commonly classified by terms that describe their application; they also are classified according to material construction, as single-metal, bimetal, or trimetal sliding bearings. The article further provides detailed tabular data on the designation and composition of the following types of bearing materials: tin-base alloys, lead-base alloys, copper-base alloys, and aluminum-base alloys. It also briefly discusses the following types of bearing materials: zinc-base alloys, silver-base alloys, gray cast irons, cemented carbides, and nonmetallic bearing materials.

This article commences with a description of the prosthetic devices and implants used for internal fixation. It describes the complications related to implants and provides a list of major standards for orthopedic implant materials. The article illustrates the body environment and its interactions with implants. The considerations for designing internal fixation devices are also described. The article analyzes failed internal fixation devices by explaining the failures of implants and prosthetic devices due to implant deficiencies, mechanical or biomechanical conditions, and degradation. Finally, the article discusses the fatigue properties of implant materials and the fractures of total hip joint prostheses.

Electroless nickel plating is used to deposit nickel without the use of an electric current. This article provides an overview of the solution composition and characteristics of the electroless nickel bath. It focuses on the metallurgical, mechanical and physical properties of electroless nickel-phosphorus coatings and electroless nickel-boron coatings. The effect of electroless nickel coatings on the fatigue strength of steel is also described. The article includes information on the recommended pretreatment procedures for different ferrous alloys, aluminum alloys, and copper alloys. It presents a detailed account of the equipment and various processes—including bulk and barrel plating—involved in electroless nickel plating, and discusses hydrogen relief methods. The article includes a comprehensive table on nickel plating applications, and concludes with information on electroless nickel coatings on composites and plastics.

This datasheet provides information on key alloy metallurgy and processing effects on tensile properties and fracture toughness of alloy 7065. Strength-toughness minima for aluminum plate alloy 7065 are presented.

Welded connections are a common location for failures for many reasons, as explained in this article. This article looks at such failures from a holistic perspective. It discusses the interaction of manufacturing-related cracking and service failures and primarily deals with failures that occur in service due to stresses caused by externally applied loads. The purpose of this article is to enable a failure analyst to identify the causative factors that lead to welded connection failure and to identify the corrective actions needed to overcome such failures in the future. Additionally, the reader will learn from the mistakes of others and use principles that will avoid the occurrence of similar failures in the future. The topics covered include failure analysis fundamentals, welded connections failure analysis, welded connections and discontinuities, and fatigue. In addition, several case studies that demonstrate how a holistic approach to failure analysis is necessary are presented.

Fretting is a special wear process that occurs at the contact area between two materials under load and subject to slight relative movement by vibration or some other force. During fretting fatigue, cracks can initiate at very low stresses, well below the fatigue limit of nonfretted specimens. This article describes the mechanisms of fretting and fretting fatigue; stress analysis, modeling, and prediction of fretting fatigue; fretting fatigue testing; and fretting prevention methods. Three general geometries and loading conditions for fretting fatigue, along with their remedies, are reviewed.

Fretting is a special wear process that occurs at the contact area between two materials under load and subject to slight relative movement by vibration or some other force. This article focuses on measures to avoid or minimize crack initiation and fretting fatigue. It lists the factors that are known to influence the severity of fretting and discusses the variables that contribute to shear stresses. These variables include normal load, relative displacement (slip amplitude), and coefficient of friction. The article describes the general geometries and loading conditions for fretting fatigue. It presents the types of fretting fatigue tests and the effect of variables on fretting fatigue from different research test programs. The article also lists the general principles and practical methods for the abatement or elimination of fretting fatigue.