2 edition of Effect of porosity and elevated temperatures on the tensile properties of cast superalloys. found in the catalog.
Effect of porosity and elevated temperatures on the tensile properties of cast superalloys.
Feraz Aslam Toosy
Thesis (Ph.D.) - University of Birmingham, Dept of Metallurgy and Materials.
Mechanical testing and deformation analysis. To demonstrate the effect of the new strengthening mechanism, we examine two similar Ni-base superalloys, ME3 and ME, for which the main difference Cited by: Powder metallurgy superalloys were developed in the mid's when stronger aircraft turbine disk materials were needed. Their characteristics of greatly reduced segregation, better hot-workability, improved mechanical properties, and cost-effective manufacturing processes made P/M superalloys highly desirable in high-temperature applications.
page 1 effect of a supersolvus heat tr eatment on the microstructure and mechanical properties of a powder metallurgy processed nickel-base superalloy by darryl slade stolz a dissertation presented to the graduate school of the university of flor ida in partial fulfillment of the requirements for the degree of doctor of philosophy university of florida Mechanical properties of structural steel at elevated temperatures and after cooling down, Fire and materials, An International Journal, Vol. 28, No, pp, John Wiley& Sons, H Outinen J. Mechanical properties of structural steels at elevated temperatures and after cooling down, Fire andCited by:
Nickel-based superalloys, which have excellent mechanical properties, high temperature oxidation resistance, and fatigue resistance at elevated temperatures, have been used extensively in aerospace, gas turbine engines, and power generation for decades [1,2,3,4,5,6].The ever-increasing demand for more efficient and powerful turbine engines continues to drive the need to improve or develop Author: Li-Shi-Bao Ling, Zheng Yin, Zhi Hu, Jun Wang, Bao-De Sun. You can write a book review and share your experiences. Other readers will always be interested in your opinion of the books you've read. Whether you've loved the book or not, if you give your honest and detailed thoughts then people will find new books that are right for them.
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A positive effect of a HIP treatment on LCF life has been reported for moderate temperatures up to °C [12, ], while the actual results show such positive effect for higher temperatures of °C as well.
Further, it can be concluded that large eutectics have a higher negative impact on fatigue life than the porosity occurring in Cited by: 7. Vol. 7, No. 2, Effect of Porosity on the Tensile Properties of Low Ductility Aluminum Alloys differential weighing technique in air and water and were compared with a standard sample cast in a large mass per-manent Cu mold.
To determine the global volumetric porosity, 18 × 18 × mm bars were cut perpendicularly to the long-File Size: 1MB. Introduction. Several studies in the literature correlate the porosity and mechanical properties of cast aluminum alloys and most of these studies use the parameter of global volumetric porosity to determine this correlation.
Apart from the porosity effect, the mechanical properties of these alloys generally result from a set of variables such as chemical composition 6,7, morphology. A superalloy, or high-performance alloy, is an alloy with the ability to operate at a high fraction of its melting point.
Several key characteristics of a superalloy are excellent mechanical strength, resistance to thermal creep deformation, good surface stability, and resistance to corrosion or oxidation. The crystal structure is typically face-centered cubic (FCC) austenitic.
Nickel-based superalloys. Nickel-based superalloys usually combine high strength and corrosion resistance during service at elevated temperatures. Initially, their development was encouraged and driven by the insight that the efficiency of thermal power generation machines can be increased by increasing the combustion temperature and/or.
During the last few decades, Ni-based superalloys have attracted considerable attention owing to their striking properties at elevated temperatures, such as high tensile and compressive yield.
The elevated temperature tensile, stress-rupture and creep properties and residual tensile properties after creep straining have been determined for two cast superalloys and several wrought NiCr-4Al-yttria oxide dispersion strengthened (ODS) alloys.
The creep behavior of the ODS alloys is similar to that of previously studied ODS nickel by: Development of Nickel Based Superalloys for Advanced Turbine Engines Article (PDF Available) in Materials Science Forum May with Reads How we measure 'reads'.
A combined experimental and computational study is performed to investigate the effect of centerline shrinkage porosity on deformation, damage, and fracture of cast steel under tensile testing. Steel plates containing shrinkage porosity are cast in sand molds, machined into test coupons, and tensile tested to fracture.
The average volumetric porosity in the gage section of the specimens with Cited by: EFFECT OF POROSITY ON MECHANICAL PROPERTIES OF CAST STEEL R.A. Hardin1and C. Beckermann2 1Research Engineer, Mechanical and Industrial Engineering University of Iowa 2Professor, Mechanical and Industrial Engineering University of Iowa Abstract Porosity is measured from radiographs of steel fatigue test specimens taken prior to.
8o TechnologicPapersoftheBureauofStandards[Vol Table2and,ingeneral,confirmedtheworkofMacPherran wheredirectcomparisonswerepossible. TABLE1 File Size: 1MB. In this thesis the influence of grain size on the mechanical properties of Inconel has been studied.
In is commonly used superalloy which has a relatively low cost but offer good mechanical properties. The research work was conducted from preparing two specimens of In that has been heat treated at different temperatures.
The grain. A compilation of data collected and maintained for many years as the property of a large aluminum company, which decided in to make it available to other engineers and materials specialists.
In tabular form, presents data on the tensile and creep properties of eight species of wrought alloys and five species of cast alloys in the various shapes used in applications.4/5(3). The distribution of shrinkage porosities in sand cast Mg-Y-RE (WE54) alloy castings was characterized through density measurement and calculated by Archimedess principle.
The effect of porosity on mechanical properties of sand cast WE54 alloy was investigated through tensile tests and microstructure observation. It was found that the shrinkage porosities distributed mainly in the middle of the Cited by: 5.
Influence of Both γ′ Distribution and Grain Size on the Tensile Properties of UDIMET Li At Room Temperature (Pages: ) Properties of New C&W Superalloys for High Temperature Disk Applications (Pages: ) The Creep and Fatigue Behavior of Haynes at Elevated Temperatures (Pages: ) Sara C. Longanbach; Carl J.
68o TechnologicPapersoftheBureauofStandards[Vol Page. sionandsummary ousmetaltheory y ledgements VII. EFFECT OF POROSITY ON DEFORMATION, DAMAGE, AND FRACTURE OF CAST STEEL Richard Hardin1, Christoph Beckermann1.
1University of Iowa, Department of Mechanical and Industrial Engineering, SC. Iowa City, IA Keywords: Casting, Porosity, Tensile Properties, Damage, Fracture. The effect of porosity on yield and tensile strength, ductility and fatigue properties is summarised below - Increasing area fractions of porosity in a weld cross-section reduce strength.
Fine porosity - when present in sufficient quantity to contribute a total area comparable to that of large pores. Effect of oxide films on tensile properties of castings Fe-rich intermetallic phase in cast Al-Si-Mg alloy Effect of Fe-rich phases on tensile properties of the castings Porosity defects in cast Al-Si-Mg alloy Effect of porosity on tensile properties of the castings hand a spherical pore with low porosity is noticed in samples sintered at °C.
This results in a remarkable enhancement of mechanical properties like micro hardness and radial crush strength. Fig. 3 depicts the sintering temperature effect on porosity for the samples of all the three groups.
The effects of microstructure and porosity were investigated on the tensile properties of AC4B type Al-Si-Cu cast alloys containing 7 mass % Si, 3 mass % Cu, mass % Mg, 0 to mass % Fe and 0 to mass % Sr. The specimens were solidified at a cooling velocity of K/s or K/s in metallic : Hyogyoung Kang, Hirofumi Miyahara, Keisaku Ogi.The effect of HIPping on the mechanical properties and microstructure of a cast Ti-6Cr-5Mo-5V-4Al alloy have been investigated.
In the cast condition, the alloy predominantly consists of coarse β grains. In comparison to the HIPped samples, it exhibits poor mechanical properties, in particular low ductility, due to large amounts of remnant by: 1.The Term 'superalloy' refers to metalic alloys that have been designed to withstand high temperatures and mechanical loads without deforming, including specifically creep, or of these superalloys have been developed for applications in fields such as gas turbines and jet engines, that is in areas where extreme heat together with mechanical loading occur.