Brittle–ductile Transition During Creep in Nearly and Fully Lamellar High-Nb TiAl Alloys PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download Brittle–ductile Transition During Creep in Nearly and Fully Lamellar High-Nb TiAl Alloys PDF full book. Access full book title Brittle–ductile Transition During Creep in Nearly and Fully Lamellar High-Nb TiAl Alloys by . Download full books in PDF and EPUB format.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
Get Book Here
Book Description
Author: F. R. Schwartzberg
Publisher:
ISBN:
Category : Brittleness
Languages : en
Pages : 86
Get Book Here
Book Description
Author: Brian Daly Worth
Publisher:
ISBN:
Category :
Languages : en
Pages : 320
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category : Chemistry
Languages : en
Pages : 2676
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category : Metallurgy
Languages : en
Pages : 1076
Get Book Here
Book Description
Author: Materials Research Society. Meeting
Publisher:
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 596
Get Book Here
Book Description
Defects such as dislocations, antiphase domains and grain boundaries, interstitials/substitutionals, and vacancies affect many physical and mechanical properties of ordered intermetallics. As a result, they often play a decisive role in determining the macroscopic behavior of not just structural intermetallics but also 'functional' intermetallics such as shape memory alloys and hydrogen storage materials. This book follows in the general tradition of the highly successful series of MRS symposia titled High-Temperature Ordered Intermetallic Alloys. However, it also represents a significant departure from its predecessors: it includes papers on functional intermetallics in addition to papers on structural intermetallics; and focuses on defects and how they affect various properties of interest in structural and functional intermetallics. Roughly 30 percent of the papers in the book are on functional intermetallics, including materials for hydrogen storage, magnetic, and shape memory applications. The remaining papers deal with structural intermetallics, including the still active areas of nickel-, iron-, and titanium-aluminides, as well as the newer materials for ultrahigh-temperature applications.
Author: Wu Fan
Publisher: Trans Tech Publications Ltd
ISBN: 3038137995
Category : Technology & Engineering
Languages : en
Pages : 1800
Get Book Here
Book Description
Volume is indexed by Thomson Reuters CPCI-S (WoS). The objective of ICAMR 2012 was to provide a forum for the discussion of new developments, recent progress and innovations in the field of Materials Science. The papers are divided into twenty-two sections, covering such topics as materials behaviour, casting and solidification, coatings and surface engineering, composites, machining technology, nanomaterials, biomedical manufacturing, sustainable manufacturing processes, manufacturing planning and scheduling, modelling and simulation, computer-aided design and engineering, semiconductor materials engineering, laser-based manufacturing and mechanical and electronic engineering control.
Author: Karthikeyan Subramanian
Publisher:
ISBN:
Category : Aluminum alloys
Languages : en
Pages :
Get Book Here
Book Description
Abstract: Despite the large body of work done in the area of high-temperature creep, the present understanding of creep mechanisms and the effect of alloying and microstructure is limited. The first part of this investigation concentrates on the creep behavior in the equiaxed microstructure of gamma-TiAl alloys, to understand the mechanisms and develop a physically-based model for creep in the gamma phase. A modification of the classic jogged-screw model has been previously adopted to explain observations of 1/2[110]-type jogged-screw dislocations in equiaxed Ti-48Al under creep conditions. The goal of this study is to verify and validate the parameters and functional dependencies that have been assumed in that model. The original solution has been reformulated with the aid of analytical modeling, numerical simulations and Transmission Electron Microscopy. Both experiment and theory lead to an excellent prediction of creep rates and stress exponents. In the second part of this study creep behavior of the fully lamellar TiAl alloys is investigated. Dislocation structures similar to those observed in the equiaxed alloys suggests that the jogged-screw model can be adapted for lamellar alloys. The aim of the model is to predict the unique creep phenomenology of fully lamellar alloys. The strengths and shortcomings of the model are discussed. Probable low stress creep mechanisms are also suggested. The origin of fully lamellar alloys' superior creep properties stems from the constrained nature of deformation in the lamellae. The results from stress drop experiments are analysed to explore the origin of the large back stresses associated with the fully lamellar alloys. Reduction of the lamellar spacing is proposed as the best way to lower creep rates. In the final part of this study, the microstructural stability of lamellar alloys during exposure to creep conditions is investigated. A detailed investigation of the creep behavior of the aged (stabilized) and unaged (unstabilized) alloys was carried out and subsequent TEM studies were done to characterize the microstructural changes during creep. Continued loss of metastable alpha-2 is proposed as the reason for the larger strain rates in all stages of creep for the alloy in the unaged condition. Dynamic recrystallization and the formation of equiaxed gamma grains are discussed. These results suggest that microstructural stability is critically important in order to achieve the highest possible creep strengths. The effect of microalloying and the role of precipitation hardening in creep are investigated. The probable mechanisms of primary, secondary and tertiary creep are discussed and methods for improving the creep properties are suggested.
Author: Fritz Appel
Publisher: John Wiley & Sons
ISBN: 352731525X
Category : Technology & Engineering
Languages : en
Pages : 763
Get Book Here
Book Description
The first book entirely dedicated to the topic emphasizes the relation between basic research and actual processing technologies. As such, it covers complex microstructures down to the nanometer scale, structure/property relationships and potential applications in key industries. From the contents: * Constitution * Thermophysical Constants * Phase Transformations and Microstructures * Deformation Behaviour * Strengthening Mechanisms * Creep * Fracture Behaviour * Fatigue * Oxidation Resistance and Related Issues * Alloy Design * Ingot Production and Component Casting * Powder Metallurgy * Wrought Processing * Joining * Surface Hardening * Applications and Component Assessment
Author: Luca Podofillini
Publisher: CRC Press
ISBN: 1315648415
Category : Technology & Engineering
Languages : en
Pages : 730
Get Book Here
Book Description
Safety and Reliability of Complex Engineered Systems contains the Proceedings of the 25th European Safety and Reliability Conference, ESREL 2015, held 7-10 September 2015 in Zurich, Switzerland. It includes about 570 papers accepted for presentation at the conference. These contributions focus on theories and methods in the area of risk, safety and
