scholarly journals Grain Size Control of TiAl Alloy with Fully Lamellar Microstructure Using Discontinuous Coarsening Reaction

1997 ◽  
Vol 61 (8) ◽  
pp. 678-683 ◽  
Author(s):  
Yukiharu Suzuki ◽  
Tetsuya Suzuki ◽  
Tokuzou Tsujimoto
Keyword(s):  
Grain Size ◽  
Tial Alloy ◽  
Lamellar Microstructure ◽  
Size Control ◽  
Grain Size Control ◽  
Discontinuous Coarsening ◽  
Fully Lamellar

Processing and Alloy Development to Optimise the Properties and Cost-Effectiveness of Components Manufactured from TiAl-Based Alloys

2004 ◽  
Vol 449-452 ◽  
pp. 25-30 ◽  
Author(s):  
Xin Hua Wu ◽  
D. Hu ◽  
M.H. Loretto
Keyword(s):  
Grain Size ◽  
Powder Processing ◽  
Thermomechanical Processing ◽  
Plastic Anisotropy ◽  
Lamellar Microstructure ◽  
Size Control ◽  
Research Programme ◽  
Alloy Development ◽  
Grain Size Control ◽  
Fully Lamellar

The IRC has carried out a major research programme over the last ten or so years aimed at developing the processing and optimisation of TiAl-based alloys. This work has covered melting, the production of shaped castings, powder processing and a range of thermomechanical processing routes in parallel with alloy development. In this paper the work aimed at understanding the factors that influence the properties of thermo-mechanically processed and cast samples of TiAl-based alloys will be reviewed. It is shown that the use of boron to control the grain size of castings leads to limited ductility in the stronger and more highly alloyed TiAl alloys because ribbon-like borides up to 200µm in length can be formed. It is also shown that although a fully lamellar microstructure offers a good balance of properties their plastic anisotropy leads to pre-yield fracture and to reduced fatigue life. It is clear that grain size control is essential if an acceptable balance of properties is to be obtained but that if casting is to be used grain refinement via boron addition is not totally satisfactory. A simple heat treatment can be used to refine the microstructure of cast boron-free alloys, which leads to ductility comparable with that in wrought samples and the associated convoluted microstructure should also eliminate pre-yield cracking.

Interfacial studies in Nb3Sn superconductors

1991 ◽  
Vol 49 ◽  
pp. 590-591
Author(s):  
Ernest L. Hall ◽  
Lee E. Rumaner ◽  
Mark G. Benz
Keyword(s):  
Grain Size ◽  
Grain Boundaries ◽  
Flux Pinning ◽  
Size Control ◽  
High Magnetic Fields ◽  
Type Ii ◽  
Reaction Interface ◽  
Liquid Diffusion ◽  
Type Ii Superconductor ◽  
Grain Size Control

The intermetallic compound Nb3Sn is a type-II superconductor of interest because it has high values of critical current density Jc in high magnetic fields. One method of forming this compound involves diffusion of Sn into Nb foil containing small amounts of Zr and O. In order to maintain high values of Jc, it is important to keep the grain size in the Nb3Sn as small as possible, since the grain boundaries act as flux-pinning sites. It has been known for many years that Zr and O were essential to grain size control in this process. In previous work, we have shown that (a) the Sn is transported to the Nb3Sn/Nb interface by liquid diffusion along grain boundaries; (b) the Zr and O form small ZrO2 particles in the Nb3Sn grains; and (c) many very small Nb3Sn grains nucleate from a single Nb grain at the reaction interface. In this paper we report the results of detailed studies of the Nb3Sn/Nb3Sn, Nb3Sn/Nb, and Nb3Sn/ZrO2 interfaces.

Grain size control of perovskite films based on β-alanine self-assembled monolayers surface treatment

2021 ◽  
pp. 138770
Author(s):  
Linlin Guan ◽  
Leiming Yu ◽  
Lijuan Wu ◽  
Shuyu Zhang ◽  
Yuting Lin ◽  
...  
Keyword(s):  
Grain Size ◽  
Surface Treatment ◽  
Size Control ◽  
Self Assembled Monolayers ◽  
Assembled Monolayers ◽  
Grain Size Control ◽  
Self Assembled

scholarly journals Grain size control in polycrystalline colloidal solids

1995 ◽  
Vol 102 (12) ◽  
pp. 5082-5087 ◽  
Author(s):  
Thomas Palberg ◽  
Wolfgang Mönch ◽  
Jürgen Schwarz ◽  
Paul Leiderer
Keyword(s):  
Grain Size ◽  
Size Control ◽  
Grain Size Control

scholarly journals Grain size control of ZIF-8 membranes by seeding-free aqueous synthesis and their performances in propylene/propane separation

2017 ◽  
Vol 544 ◽  
pp. 306-311 ◽  
Author(s):  
Shunsuke Tanaka ◽  
Kenta Okubo ◽  
Koji Kida ◽  
Miki Sugita ◽  
Takahiko Takewaki
Keyword(s):  
Grain Size ◽  
Size Control ◽  
Aqueous Synthesis ◽  
Grain Size Control

scholarly journals Grain Size Control by Oxide Dispersion in Austenitic Stainless Steel

2003 ◽  
Vol 89 (5) ◽  
pp. 616-622 ◽  
Author(s):  
Koji TAKANO ◽  
Ryuji NAKAO ◽  
Shigeo FUKUMOTO ◽  
Toshihiro TSUCHIYAMA ◽  
Setsuo TAKAKI
Keyword(s):  
Grain Size ◽  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Size Control ◽  
Oxide Dispersion ◽  
Grain Size Control
Sign in / Sign up

Export Citation Format

Share Document