by National Aeronautics and Space Administration, National Technical Information Service, distributor in [Washington, D.C.], [Springfield, Va .
Written in English
|Other titles||Weldability of a nickel based superalloy.|
|Statement||Joseph M. Kalinowski.|
|Series||NASA contractor report -- 195376., NASA contractor report -- NASA CR-195376.|
|Contributions||United States. National Aeronautics and Space Administration.|
|The Physical Object|
Abstract The electron beam welding process is used to investigate the weldability of the Ni-based superalloy Udimet U. This is a modified form of the alloy Udimet , which has reduced concentrations of interstitial elements such as boron, silicon, and Size: 7MB. Allvac RTM PLUS(TM) ( Plus) is a new Ni-base superalloy developed to be used in land and aero gas turbine applications. Plus was developed to . (). Weldability and weld performance of candidate nickel based superalloys for advanced ultrasupercritical fossil power plants Part II: weldability and cross-weld creep performance. Science and Technology of Welding and Joining: Vol. 21, No. 5, pp. Cited by: The influence of chemical composition in terms of i.e. hardening elements and impurities, microstructure of base material and weld zone, together with welding processes and corresponding parameters and heat input are discussed and related to the cracking susceptibility of different nickel based : Joel Andersson.
Hydrogen embrittlement (HE) is the deterioration of structural properties of solid metals due to the presence of hydrogen. Alloy nickel-based superalloy is widely used in intense environments due to its excellent mechanical properties . This book is dedicated to Jackie Kiser, my friend, my spiritual partner, and my co - worker in all that I set out to do. of welding metallurgy and weldability of nickel and nickel alloys. This book focuses on the metallurgical behavior of Ni - base alloys with. the weldability of precipitation hardened superalloys from a metallurgical standpoint. Two newly developed superalloys Allvac ® Plus TM and Haynes ® ® are compared with the two well established Alloy and Waspaloy. The ability of Ni-base alloys to be joined by welding processes and to perform as intended in their service environment describes their ‘weldability.’ Testing procedures are available that can evaluate weldability so that proper material or process selection can be implemented during fabrication and repair.
The principal limitation of today’s Ni- and Fe-based superalloys continues to be their susceptibility to intergranular degradation arising from creep, hot corrosion, and fatigue. Many precipitation-strengthened superalloys are also difficult to weld, owing to the formation of heat-affected zone (HAZ) cracks during postweld heat treatments (PWHTs). The present work Cited by: A STUDY OF LASER WELDABILITY OF IN NICKEL-BASED SUPERALLOY IN A NEW PRE-WELD HEAT TREATMENT CONDITION BY JOHNSON OLUBAYO AINA A thesis submitted to the Faculty of Graduate Studies in partial fulfillment of the requirements for the Degree of MASTER OF SCIENCE Department of Mechanical and Manufacturing Engineering . Thus, a superalloy operating at °C in the vicinity of the melting temperature of nickel, °C, working at a τ of ( + )/( + ) ~ , is classified as a high-temperature material. But so is ice moving in a glacier field at –10 °C, since τ is / ~ , although its temperature is substantially lower. The weldability of nickel-based superalloys is significantly better than that of other metals and alloys. This may be attributed to the material’s elevated creep resistance and high yield strength. Examples of nickel-based superalloys. Here are some commonly used nickel-based superalloys available in the market.