Mechanical Properties of Rapidly Solidified Nickel-Base Superalloys and Intermetallics

1985 ◽  
Vol 58 ◽  
Author(s):  
A. I. Taub ◽  
M. R. Jackson
Keyword(s):  
Mechanical Properties ◽  
High Temperature ◽  
Powder Metallurgy ◽  
Rapid Solidification ◽  
Plasma Deposition ◽  
Spray Forming ◽  
Hot Workability ◽  
Solidification Processing ◽  
Nickel Base ◽  
Rapidly Solidified

ABSTRACTThe improvements in the mechanical properties of nickel-base alloys that have been made possible by rapid solidification processing are reviewed. The results of processing by powder metallurgy, laser melting, low pressure plasma deposition and spray forming are examined. In general, the increased homogeneity obtained by rapid solidification allows for increased alloying and improved hot workability. The refined grain size improves the low and intermediate temperature strength, but leads to lower strengths at high temperature. For the high temperature applications, post solidification grain growth is required, as for example the directional recrystallization of powder metallurgy preforms. The development of a novel means of producing a fine dispersion from amorphous alloy precursors and the recent work attempting to improve the ductility of the intermetallic phases NiAl and Ni3A1 are also described.

A review of Rapid Solidification Studies of Intermetallic Compounds

1984 ◽  
Vol 39 ◽  
Author(s):  
C. C. Koch
Keyword(s):  
Mechanical Properties ◽  
Intermetallic Compounds ◽  
Rapid Solidification ◽  
Iron Aluminides ◽  
Subsequent Degradation ◽  
Ordered Intermetallic ◽  
Fcc Phase ◽  
Nickel Base ◽  
Rapidly Solidified ◽  
Compositional Segregation

ABSTRACTA review of rapid solidification studies of high temperature ordered intermetallic compounds is presented. Emphasis is on the nickel - and iron - aluminides which are of potential interest as structural materials. The nickel-base aluminides which have been rapidly solidified exhibit changes in grain size, compositional segregation, and degree of long range order (as reflected in APB size and distribution) which markedly affect mechanical properties. Some experiments indicate the formation of a metastable L12 phase in rapidly solidified Fe-(Ni, Mn)-Al-C alloys, while other work observes only a metastable fcc phase in the same composition range. The metastable phases and/or microstructures in both nickel and iron aluminides are destroyed by annealing at temperatures >750K, with subsequent degradation of mechanical properties. Rapid solidification studies of several other intermetallic compounds are briefly noted.

scholarly journals Effect of Microstructure on High-Temperature Mechanical Behavior of Nickel-Base Superalloys for Turbine Disc Applications

2011 ◽  
Vol 278 ◽  
pp. 259-264 ◽  
Author(s):  
Heather J. Sharpe ◽  
Ashok Saxena
Keyword(s):  
Mechanical Properties ◽  
High Temperature ◽  
Powder Metallurgy ◽  
Creep Crack Growth ◽  
Operating Conditions ◽  
Test Material ◽  
High Temperature Mechanical Properties ◽  
Turbine Disc ◽  
Alloy Microstructure ◽  
Nickel Base

The objective of this work was to establish relationships between alloy microstructure and high temperature mechanical properties such as strength, creep, and creep crack growth in Nickel-base powder metallurgy superalloys. Systematic variations of super solvus heat-treatments generated test material from three next-generation turbine disc alloys. Quantification of key microstructural features such as γ’ distribution and morphology and grain boundary serrations was coupled with mechanical testing results in order to optimize microstructure for operating conditions specific to the bore region.

Spray Forming and Thermal Processing for High Performance Superalloys

2005 ◽  
Vol 475-479 ◽  
pp. 2773-2778 ◽  
Author(s):  
Guo Qing Zhang ◽  
Zhou Li ◽  
Zhong Wu Liu ◽  
Zhi Hui Zhang ◽  
Yifei Zhang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Thermal Processing ◽  
High Performance ◽  
Deposition Process ◽  
Spray Forming ◽  
Hot Workability ◽  
Forming Technology ◽  
Turbine Disks ◽  
New Processing ◽  
Rapidly Solidified

A unique pilot low-pressure spray forming plant was established and its spray atomisation and deposition process developed to study the new processing methods for high performance materials and to develop spray forming technology suitable for making sound superalloy preforms. The results indicated that high density (>99%) preforms (billets and rings) with little gas pick-ups and with the microstructural features of rapidly solidified superalloys, i.e. refined equiaxed grains and uniform microstructure, could be achieved after the optimisation of the spray atomisation and deposition process. The effects of subsequent thermal processing on the density, microstructure and mechanical properties of the spray formed superalloy were investigated. Compared to the turbine disks and rings made by wrought superalloys, the spray formed superalloys with identical chemistry showed significantly improved metallurgical quality, higher mechanical properties, and better hot workability.

HASTELLOY ALLOY S

Alloy Digest ◽  
1973 ◽  
Vol 22 (1) ◽  
Keyword(s):  
Mechanical Properties ◽  
High Temperature ◽  
Heat Treating ◽  
High Temperature Alloy ◽  
Excellent Thermal Stability ◽  
Cabot Corporation ◽  
High Temperature Mechanical Properties ◽  
Temperature Performance ◽  
Resistance To Oxidation ◽  
Nickel Base

Abstract HASTELLOY alloy S is a nickel-base high-temperature alloy having excellent thermal stability, good high-temperature mechanical properties and excellent resistance to oxidation up to 2000 F. This datasheet provides information on composition, physical properties, elasticity, and tensile properties as well as creep. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Ni-184. Producer or source: Stellite Division, Cabot Corporation.

Development Of High-Strength Aluminum-Based Alloys By Synthesis Of New Multicomponent Quasicrystals

1998 ◽  
Vol 553 ◽  
Author(s):  
A. Inoue ◽  
H. M. Kimura
Keyword(s):  
Mechanical Properties ◽  
Powder Metallurgy ◽  
Rapid Solidification ◽  
Future Development ◽  
High Strength ◽  
Supercooled Liquid ◽  
Engineering Properties ◽  
Atomic Configuration ◽  
Lanthanide Metal ◽  
Bulk Alloys

AbstractBy the control of composition, clustered atomic configuration and stability of the supercooled liquid in the rapid solidification and powder metallurgy processes, high-strength Al-based bulk alloys containing nanoscale nonperiodic phases were produced in AI-Ln-LTM, AI-ETM-LTM and Al-(V, Cr, Mn)-LTM (Ln=lanthanide metal, LTM=VII and VIII group metals, ETM=IV to VI group metals) alloys containing high Al contents of 92 to 95 at%. The nonperiodic phases are composed of amorphous or icosahedral (I) phase. In particular, the Al-based bulk alloys consisting of nanoscale I particles surrounded by Al phase exhibit much better mechanical properties as compared with commercial Al base alloys. The success of producing the Al-based alloys with good engineering properties by use of I phase is important for future development of I-based alloys as practical materials.

Micro-Pore Structure and Mechanical Properties of High Temperature Self-Lubricating Biomimetic TiC/FeCrWMoV Cermets

2007 ◽  
Vol 546-549 ◽  
pp. 2273-2278 ◽  
Author(s):  
Yan Jun Wang ◽  
Zuo Min Liu
Keyword(s):  
Mechanical Properties ◽  
High Temperature ◽  
Powder Metallurgy ◽  
Pore Structure ◽  
Network Structure ◽  
Sweat Gland ◽  
Solid Lubricant ◽  
Rayleigh Distribution

A new cermet sinter with sweat-gland micro-pore structure has been developed by powder metallurgy technology in vacuum. The effects of the pore-forming materials on micro-pore structure and Y2O3 additions as well mechanical properties of TiC/FeCrWMoV cermets were investigated. Some typical sweat-gland micro-pores were formed while compound additives TiH2 and CaCO3 adding into the sinter matrix. The porosity of the cermet sinters changes from 20% to 28% with the compound additives from 6% to 8%, and the micro-pores of sinters exist a regularized and interpenetrated network structure just like human’s sweat-gland one and obeying to Rayleigh Distribution. As such the sinters could be easily infiltrated with high-temperature solid lubricant. For improving the property of the ceramet sinter, the elements Y2O3 of 0.6～0.8% (vol. fraction ) was also added into the sinter matrix and its effect on the sinter has been also discussed .

Optimized hot workability of a powder metallurgy nickel-base superalloy

2019 ◽  
Vol 147 ◽  
pp. 340-352 ◽  
Author(s):  
Liming Tan ◽  
Yunping Li ◽  
Guoai He ◽  
Feng Liu ◽  
Yan Nie ◽  
...  
Keyword(s):  
Powder Metallurgy ◽  
Nickel Base Superalloy ◽  
Hot Workability ◽  
Nickel Base ◽  
Base Superalloy
Sign in / Sign up

Export Citation Format

Share Document