3 edition of Effects of processing and prolonged high temperature on the microstructure of Nb-1Zr-C sheet found in the catalog.
Effects of processing and prolonged high temperature on the microstructure of Nb-1Zr-C sheet
by National Aeronautics and Space Administration, National Technical Information Service, distributor in [Washington, DC], [Springfield, Va
Written in English
|Statement||Mehmet Uz and R.H. Titran.|
|Series||[NASA technical memorandum] -- NASA TM-106370., NASA technical memorandum -- 106370.|
|Contributions||Titran, R. H., United States. National Aeronautics and Space Administration.|
|The Physical Object|
Vogt, ), there has been little research on the effects of cooling rate on the microstructure and microhardness (Nagpal and Baker, ; Lu et al., ). Especially, the effect of cooling rate on the microhardness of low (AISI ) and medium carbon (AISI , AISI ) steels are rarely reported. The present study is aimed at under-. Effects of Thermomechanical Processing on Tensile and Long-Time Creep Behavior Refractory metals and their alloys are the leading candidates for high-temperature applications due to their high melting points. In particular, various alloys of niobium (Nb, melting point = K) Nb- 1Zr-C ALLOYS Sample 0 a Nb- 1Zr LC-DA A.
and have examined the effects of PWHT temperatures on the mechanical properties of each weld metal. The upper limits of the PWHT temperature for the respective weld metals are considered. Introduction High-Cr ferritic heat-resistant steel is a material that, along with austenitic heat-resistant steel, has long been studied and utilized. The effects of tempering temperature and time on the mechanical properties of ductile cast iron is investigated in the current work. The specimens were austenitized at °C for minutes and then quenched in mineral oil at room temperature. Immediately after quenching the specimens were tempered at °C and °C for 60min, 90min, and.
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High temperature stability of the microstructure of Nb-lZr sheet containing and wt.%C was studied as affected by processing and prolonged K exposure with and without applied stress. Sheets were fabricated by cold rolling bars that were single- double.
Get this from a library. Effects of processing and prolonged high temperature on the microstructure of Nb-1Zr-C sheet. [Mehmet Uz; R H Titran; United States. High temperature stability of the microstructure of Nb-1Zr sheet containing and wt.
percent C was studied as affected by processing and prolonged K exposure with and without applied : R. Titran and Mehmet Uz. Abstract. A systematic study to evaluate the effects of thermomechanical processing on the microstructure and mechanical properties of Nb-1Zr alloy sheet containing and wt.%C (PWC) was conducted and compared to the results of : Mehmet Uz and Robert H.
Titran. High temperature stability of the microstructure of Nb-1Zr sheet containing and wt. percent C was studied as affected by processing and prolonged K exposure with and without applied. The construction industry continues to develop and the requirements for cement performance are getting higher and higher.
At the same time, in the steel industry, the discharge of steel slag is also increasing. The effective reuse of steel slag has become a prominent problem in the steel industry.
Therefore, it is envisaged to use steel slag as a raw material for the cement production. High-performance Nd-Fe-B magnets with nominal composition of Nd Effect of Temperature Gradient on the Microstructure of the Rapidly Solidified Nd–Fe–B Strips - IEEE Journals & Magazine Skip to Main Content.
Cu samples were subjected to high-pressure torsion (HPT) with up to 6 turns at room temperature (RT) and liquid nitrogen temperature (LNT), respectively. The effects of temperature on grain refinement and microhardness variation were investigated.
For the samples after HPT processing at RT, the grain size reduced from 43 μm to nm, and the Vickers microhardness increased from. Figs. 2(a)–(f) present the typical optical microstructures of the samples after ECAP processing at different can be seen that for the samples processed at low temperature, below °C (Fig.
2(a)–(d)), the deformation microstructures mainly consist of severely elongated grains, as well as very high density of lamella in the interior of some grains. temperature or at intermittently high temperature. For a prolonged service life, such as 20 years, plain carbon steels are usually limited to a maximum operating temperature of °F (°C); the ½% molybdenum alloy steels to approximately °F (°C); and the stainless steels to considerably higher temperatures depending upon the type used.
In the present investigation, a systematic study of the evolution of microstructure and crystallographic texture during hot deformation of Nb-1ZrC was carried out in the temperature range K ( °C) at different strain rates ofand s−1. The aim was to examine the mechanisms of dynamic recovery and recrystallization in a high-temperature range.
In this study, C/SiC–ZrC composites were fabricated by the combining slurry process with PIP, and then annealed at – °C. The effects of high-temperature annealing on the flexural and ablation properties of the composites were studied regarding carbon fiber, matrix and interface.
Experimental procedure Sample preparation. Effect of High Temperatures on the Microstructure of Cement Paste M. Tantawy Chemistry Department, Faculty of Science, Minia University, Minya, Egypt Abstract The microstructural and compositional changes within the cement paste ex-posed to high temperatures were monitored by XRD, FTIR, TGA/DTA and.
The effects of activation temperature and time on the microstructure and surface functional groups of the liquefied wood activated carbon fibers (LWACFs) were studied using analysis of burning behavior, X-ray diffraction, nitrogen adsorption-desorption isotherms, X-ray photoelectron spectroscopy, and SEM.
It has been widely acknowledged that the melting time and temperature have a significant influence on the microstructure and physical properties of alloys. Therefore, a proper melting process is one of the decisive factors for optimizing the microstructure and thermoelectric performance of materials.
Herein, we prepared polycrystalline p-type BiSbTe3. When the temperature of aluminium is increased, the metal expands and this is called thermal expansion. One example of thermal extension is that if, for example, the temperature of a piece of aluminium alloy is ̊C and its length is mm long, and it is heated to a temperature of 30 ̊C, it will subsequently be mm long due to thermal expansion.
EFFECT OF SOLUTION TREATMENT TEMPERATURE ON THE MICROSTRUCTURE AND TENSILE PROPERTIES OF P/M (HIP) PROCESSED SUPERALLOY INCONEL G. Appa Rao ', Mahendra Kumar ', M.
Srinivas ' and D. Sarma ' ' Defence Metallurgical Research Laboratory Kanchanbagh (PO), Hyderabad -India. Effect of high temperature aging on microstructure and mechanical properties of HR3C heat resistant steel. Materials Science and Technology: Vol.
30, No. 2, pp. Abstract A commercial purity Al alloy and an AlSc (wt.%) alloy, the latter in either the supersaturated or artificially aged condition, were accumulative roll bonded at either or °C to high strain to generate sheet materials consisting of 32 or 64 alternating layers of Al and Al(Sc).
The microstructure and texture of the processed materials were investigated mainly using electron. Powder thixoforming, a novel method for preparing and forming particle-reinforced metal-matrix composites has been proposed, and the effect of reheating temperature on the microstructure and tensile properties of a thixoforged SiCp/ Al-based composite was investigated.
The results indicated that the temperature influences the liquid amount and microstructure compactness and the. Ternary MoSi[subscript 2] Compounds for High Temperature Structural Applications p.
Molybdenum-Rhenium Disilicide Alloys p. Investigation of B2 and Related Phases in Ti-Modified Nb-Al Alloys p. Effects of Processing and Prolonged High Temperature Exposure on the Microstructure of Nb-IZr-C Sheet p.
About this book. These papers present advancements in all aspects of high temperature electrochemistry, from the fundamental to the empirical and from the theoretical to the applied.
Effects of Microstructure on Deformation Behaviour of AZ91D Cast Alloy (Pages: ) Part XX: Long‐Term Stability of High Temperature Materials.Hydrogenated amorphous carbon films codoped with Si and Al ((Si, Al)/a-C:H) were deposited through radio frequency (RF, MHz) magnetron sputtering on Si () substrate at different temperatures.
The composition and structure of the films were investigated by means of X-ray photoelectron spectroscopy (XPS), TEM, and Raman spectra, respectively. The substrate temperature effect .