scholarly journals CBED-Measurement of Residual Internal Strains in the Neighbourhood of TCP-Phases in Ni-Base Superalloys

2000 ◽  
Author(s):  
F. Pyczak ◽  
H. Biermann ◽  
H. Mughrabi ◽  
A. Volek ◽  
R.F. Singer
Keyword(s):  
Tcp Phases ◽  
Internal Strains

CBED-Measurement of Residual Internal Strains in the Neighbourhood of TCP-Phases in Ni-Base Superalloys

2006 ◽  
pp. 91-95
Author(s):  
Florian Pyczak ◽  
Haël Mughrabi
Keyword(s):  
Tcp Phases ◽  
Internal Strains

A NEW WELDING MATERIAL FOR REGENERATION IN THE WELDING TECHNOLOGY BASED ON NICKEL. ANALYSIS OF THE COMPOSITION AND PROPERTIES OF DEFORMABLE HEAT-RESISTANT HIGH-CHROMIUM NICKEL-BASED ALLOYS FOR WELDED PARTS. ANALYSIS OF EXISTING FUELLING STATIONS TYPES AND VEHICLES USING HYDROGEN, HYDROGEN PRODUCTION AND STORING METHODS

2019 ◽  
pp. 43-48
Author(s):  
Ben Nengjun ◽  
Zhou Pengfei ◽  
Oleksandr Labartkava ◽  
Mykhailo Samokhin
Keyword(s):  
Rare Earth ◽  
High Temperature ◽  
Nickel Alloys ◽  
Total Content ◽  
Operating Conditions ◽  
High Temperature Strength ◽  
High Chromium ◽  
Salt Corrosion ◽  
Tcp Phases ◽  
The Impact

This work involves an analysis of high-chromium high-temperature deformable wieldable nickel alloys for use in GTE repair assemblies. It is shown that the alloys EP868 (VZh98) and Haynes 230 can be used in welded assemblies with an operating temperature of 800-1100 °C. The alloys Nimonic 81, Nimonic 91, IN 935, IN 939, and Nicrotan 2100 GT also have a high potential for use in welded assemblies. They are characterized by a combination of good weldability, high-temperature strength, and resistance to scaling. There have been conducted studies on high-temperature salt corrosion of model nickel alloys. They allowed establishing the patterns of the impact of base metal alloying with chromium, aluminum, titanium, cobalt, tungsten, molybdenum, niobium, tantalum and rare earth metals on the critical temperature of the start of salt corrosion Tcor and the alloy mass loss. It has been established that alloys with a moderate concentration (13-16%) of chromium can possess satisfactory hightemperature corrosion resistance (HTC resistance) under the operating conditions of ship GTE. The HTC resistance of CrAl-Ti alloys improves upon reaching the ratio Ti/Al ˃ 1. Meanwhile, the ratio Ti/Al ˂ 1 promotes the formation of corrosion products with low protective properties. The positive effect of tantalum on the HTC resistance of alloys is manifested at higher test temperatures than that of titanium, and the total content of molybdenum and tungsten in alloys is limited by the condition 8Mo2 – 2W2 = 89. The presence of refractory elements stabilizes the strengthening phase and prevents formation of the ɳ-phase. However, their excess promotes formation of the embrittling topologically close packed (TCP) phases and boundary carbides of an unfavorable morphology. Based on the studies of the HTC resistance, there has been identified a class of model high-temperature corrosionresistant nickel alloys with a moderate or high chromium content (30%), Ti/Al ˃ 1, and a balanced content of refractory and rare-earth elements.

New Phases in a Multicomponent High Ruthenium Single Crystal Superalloy

2005 ◽  
Vol 475-479 ◽  
pp. 655-660 ◽  
Author(s):  
Q. Feng ◽  
L.J. Rowland ◽  
T.M. Pollock
Keyword(s):  
Single Crystal ◽  
Dendritic Structure ◽  
Thermal Exposure ◽  
Single Crystal Superalloy ◽  
Heusler Phase ◽  
Topologically Close Packed ◽  
Tcp Phases ◽  
Δ Phase

Three unusual Ru-rich phases have been identified in a multicomponent Ni-base single crystal superalloy, including a L21 Ru2AlTa Heusler phase, a B2 RuAl phase and a hcp Re(Ru)-rich δ phase. These phases have their own preferential precipitation location within the dendritic structure. No conventional topologically-close-packed (TCP) phases have been observed with thermal exposure at 950oC for 1500 hours.

Internal Strains in Single Grains of Fatigued Polycrystalline Nickel

2002 ◽  
Vol 404-407 ◽  
pp. 823-828 ◽  
Author(s):  
Ellen Thiele ◽  
Jörg Bretschneider ◽  
Cesar Buque ◽  
Norbert Schell ◽  
Andreas Schwab ◽  
...  
Keyword(s):  
Polycrystalline Nickel ◽  
Internal Strains

scholarly journals Second Phase Precipitation in As-Welded and Solution Annealed Alloy 22 Welds

2006 ◽  
Vol 128 (4) ◽  
pp. 644-647 ◽  
Author(s):  
Bassem S. El-Dasher ◽  
Sharon G. Torres
Keyword(s):  
Large Scale ◽  
Thick Plate ◽  
Electron Backscatter Diffraction ◽  
Second Phase ◽  
Solution Annealing ◽  
Annealed Alloy ◽  
Precipitation Characteristics ◽  
Alloy 22 ◽  
Tcp Phases ◽  
Backscatter Diffraction

The precipitation characteristics of tetrahedrally close-packed (TCP) phases during the welding and the subsequent solution annealing process of Alloy 22 1 1∕2in. thick plate double-U prototypical welds are investigated. Electron backscatter diffraction was used to provide large scale microstructural observation of the weld cross section, and scanning electron microscopy was used to map the location of the TCP phases. Analysis shows that TCP precipitation occurs congruent to the weld passes, with the solution annealing reducing the sizes of coarser precipitates.

Direct measurement of internal strains in YBa2Cu3O7−x thin films on SrTiO3 substrates

1997 ◽  
Vol 282-287 ◽  
pp. 593-594
Author(s):  
Ming Li ◽  
Xuejun Jin ◽  
Jingyang Xu
Keyword(s):  
Thin Films ◽  
Direct Measurement ◽  
Internal Strains

Effect of minor additions on the formation of TCP phases in modified RR2086 SX superalloys

2004 ◽  
Vol 366 (1) ◽  
pp. 135-143 ◽  
Author(s):  
Y.H Kong ◽  
Q.Z Chen
Keyword(s):  
Tcp Phases

Mutation in TCP phases and superior stress rupture life led by W/Mo ratio in Ni-based single crystal superalloys

2022 ◽  
pp. 131656
Author(s):  
Jinbin Chen ◽  
Jingyang Chen ◽  
Qinjia Wang ◽  
Yidong Wu ◽  
Qing Li ◽  
...  
Keyword(s):  
Single Crystal ◽  
Rupture Life ◽  
Stress Rupture ◽  
Stress Rupture Life ◽  
Tcp Phases

ASEAN will be weakened by internal strains

2021 ◽  
Keyword(s):  
Strategic Partnership ◽  
Small States ◽  
Informal Leadership ◽  
Leadership Roles ◽  
Content Type ◽  
Cooperation Mechanism ◽  
The Us ◽  
Internal Strains

Significance This year, it plans to hold its 38th and 39th summits back-to-back on October 26-28. The decision to postpone the first meeting is likely a response to internal strains. The bloc is struggling to deal will the ongoing COVID-19 crisis, increased jockeying among the region’s powers and the fallout of the February 1 coup in Myanmar. Impacts Subregional initiatives such as the US-Mekong Partnership and the China-led Lancang-Mekong Cooperation mechanism will become more prominent. China will push to elevate the ASEAN-China strategic partnership to a comprehensive strategic partnership. With several small states in line to chair ASEAN, some of the bloc's larger members such as Indonesia will assume informal leadership roles.

Large internal strains in very small iron oxide nanoparticles fabricated by spark discharge with electrodynamic acceleration of plasma jumpers

Vacuum ◽  
2016 ◽  
Vol 132 ◽  
pp. 1-4 ◽  
Author(s):  
D.S. Portnov ◽  
I.V. Beketov ◽  
A. Larrañaga ◽  
A. Martínez-Amesti ◽  
G.V. Kurlyandskaya
Keyword(s):  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Spark Discharge ◽  
Oxide Nanoparticles ◽  
Internal Strains ◽  
Electrodynamic Acceleration
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