Effect of Al and Ti Additions in Cast Nickel Base Alloy, Grade Hastelloy X by Arc Melting Process on Microstructures and Oxidation Behavior at 900°C and 1000°C

2014 ◽  
Vol 548-549 ◽  
pp. 274-279 ◽  
Author(s):  
Pajaree Srigiofun ◽  
Panyawat Wangyao ◽  
Gobboon Lothongkum ◽  
Ekasit Nisaratanaporn
Keyword(s):  
Oxidation Resistance ◽  
Base Alloy ◽  
Melting Process ◽  
Vacuum Arc ◽  
Nickel Base Alloy ◽  
Hastelloy X ◽  
Σ Phase ◽  
Arc Melting ◽  
The Matrix ◽  
Nickel Base

The nickel base alloy, grade Hastelloy X was modified by Aluminum and Titanium additions by means of vacuum arc melting process in order to improve microstructural characteristics and oxidation resistance. The arc melted Hastelloy X was added Aluminum and Titanium each for 2%, 4% and 6% by weight. Then all specimens were performed with heat treatment, which consists of solutioning treatment at 1125°C for 24 hours and precipitation aging at temperatures of 760°C, 800°C and 845°C for 24 hours. Both aluminum and titanium additions resulted in network intermetalic phase formation, namely, σ-phase, throughout the matrix. Furthermore, the addition of both elements provided the better oxidation resistance for the alloys.

Effect of Alloying Modification in Arc Melted Hastelloy X on Microstructures and Oxidation Resistance at Elevated Temperatures

2015 ◽  
Vol 658 ◽  
pp. 8-13
Author(s):  
Pajaree Srigiofun ◽  
Panyawat Wangyao ◽  
Tanaporn Rojhirunsakool
Keyword(s):  
Oxidation Resistance ◽  
Elevated Temperatures ◽  
Base Alloy ◽  
Research Work ◽  
Intermetallic Phase ◽  
Melting Furnace ◽  
Vacuum Arc ◽  
Titanium Addition ◽  
Hastelloy X ◽  
Arc Melting

The present research work has an aim to modify microstructure and oxidation behavior of Hastelloy X, a solid solution nickel base alloy, by both aluminium and titanium additions by mean of arc melting process. The Hastelloy X was added both Al and Ti (50:50) for 2% 4% and 6% by weight and casted by vacuum arc melting furnace. Then all received specimens were performed heat treatment, which consist of solutioning treatment at 1175°C for 4 hours and aging temperatures for 760°C, 800°C and 845°C for 24 hours. From the obtained results, it was found that the amount of both Al and Ti additions as well as precipitation aging temperature provided significant effect on both final microstructure and oxidation behaviors at 900°C and 1000°C. Widmanstatten type of microstructure was found in many case. Intermetallic phase formation of molybdenum and chromium was also found in all cases by element mapping. This phase should be γ’-phase. Both aluminium and titanium additions could not provide beneficial effect on oxidation resistance tests at temperature of 900°C and 1000°C. However, with 4%wt. of both aluminium and titanium addition, it resulted in slightly increasing of oxidation resistance at temperature of 1000°C

UDIMET 700

Alloy Digest ◽  
1987 ◽  
Vol 36 (1) ◽  
Keyword(s):  
Gas Turbines ◽  
Base Alloy ◽  
Heat Treating ◽  
Vacuum Arc ◽  
Vacuum Induction Melting ◽  
Induction Melting ◽  
Nickel Base Alloy ◽  
Vacuum Arc Remelting ◽  
Temperature Performance ◽  
Nickel Base

Abstract UDIMET 700 is a wrought nickel-base alloy produced by vacuum-induction melting and further refined by vacuum-arc remelting. It has excellent mechanical properties at high temperatures. Among its applications are blades for aircraft, marine and land-based gas turbines and rotor discs. 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, joining, and surface treatment. Filing Code: Ni-51. Producer or source: Special Metals Corporation. Originally published March 1959, revised January 1987.

UDIMET 90

Alloy Digest ◽  
1972 ◽  
Vol 21 (6) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Base Alloy ◽  
Heat Treating ◽  
Vacuum Arc ◽  
Vacuum Induction Melting ◽  
Induction Melting ◽  
Nickel Base Alloy ◽  
Vacuum Arc Remelting ◽  
Temperature Performance ◽  
Nickel Base

Abstract UDIMET 90 is a nickel-base alloy developed for elevated-temperature service. It is produced by vacuum induction melting and vacuum arc remelting techniques to develop optimum properties. 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, joining, and surface treatment. Filing Code: Ni-174. Producer or source: Special Metals Corporation.

INCONEL 702

Alloy Digest ◽  
1958 ◽  
Vol 7 (3) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Physical Properties ◽  
Tensile Properties ◽  
Oxidation Resistance ◽  
Elevated Temperatures ◽  
Base Alloy ◽  
Heat Treating ◽  
Nickel Base Alloy ◽  
International Nickel Company ◽  
Nickel Base

Abstract INCONEL 702 is a nickel-base alloy having moderate strength with exceptional oxidation resistance at elevated temperatures. This datasheet provides information on composition, physical properties, elasticity, and tensile properties as well as creep. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Ni-40. Producer or source: International Nickel Company Inc..

COLMONOY No. 21

Alloy Digest ◽  
1996 ◽  
Vol 45 (3) ◽  
Keyword(s):  
Cast Iron ◽  
Physical Properties ◽  
Oxidation Resistance ◽  
Base Alloy ◽  
Nickel Base Alloy ◽  
Powder Metal ◽  
High Oxidation ◽  
High Oxidation Resistance ◽  
Nickel Base

Abstract Colmonoy No. 21 is a nickel-base alloy for repairing cast iron parts. The deposit has high oxidation resistance, develops a hardness of Rockwell C 26-31, and is easily finished by filing or grinding. This datasheet provides information on composition, physical properties, and hardness. It also includes information on machining, joining, and powder metal forms. Filing Code: Ni-504. Producer or source: Wall Colmonoy Corporation.

Morphology of γ Precipitates in Ni-Rich γ'-Ni3 (Al,Ta)

1972 ◽  
Vol 30 ◽  
pp. 588-589
Author(s):  
B. H. Kear ◽  
J. E. Doherty ◽  
A. F. Giamei ◽  
L. P. Lemaire
Keyword(s):  
Heat Treatment ◽  
Solid Solution ◽  
Binary System ◽  
Base Alloy ◽  
Ti Alloy ◽  
Nickel Base Alloy ◽  
New Findings ◽  
The Matrix ◽  
Nickel Base ◽  
Cuboidal Precipitate

The microstrueture of a commercial nickel-base alloy normally consists of a coherent, cuboidal precipitate of γ’ (alloyed Ni3Al) in a matrix of γ (Ni solid solution). Recently, Ham et al., working with the ternary alloy 78Ni-l8Al-4Ti (a/o), have shown that by appropriate heat treatment a completely novel microstrueture can be developed, in which the matrix is γ’ and the precipitate is platelet γ. The present study represents an extension of this work, and reports some new findings on precipitation of γ in γ’ in alloys similar in composition to the Ni-Al-Ti alloy but with Ta replacing Ti.The alloys used were solutionized in the range 2200-2400°F and aged at l600°F for 24hrs (giving ∼ 10 vol. percent of γ in γ’). According to our most recent findings, unlike the binary system, the solubility of γ’ for γ reaches a maximum at ∼ 2200°F in these alloys.

ALLVAC 718-OP

Alloy Digest ◽  
2003 ◽  
Vol 52 (3) ◽  
Keyword(s):  
Corrosion Resistance ◽  
High Temperature ◽  
Physical Properties ◽  
Base Alloy ◽  
Melting Process ◽  
Heat Treating ◽  
Nickel Base Alloy ◽  
Gamma Prime ◽  
Temperature Performance ◽  
Nickel Base

Abstract Allvac 718-OP is a versatile alloy that is vacuum induction melted followed by a consumable melting process. The alloy is a special chemistry vacuum melted version of standard Allvac 718. It is a precipitation-hardenable, nickel-base alloy that can be used from -253 deg C (-423 deg F) to 704 deg C (1300 deg F). The main hardening constituent is a niobium-containing gamma prime precipitate. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on low and high temperature performance, and corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Ni-605. Producer or source: Allvac Metals Company.

ALTEMP 263 ALLOY

Alloy Digest ◽  
2009 ◽  
Vol 58 (7) ◽  
Keyword(s):  
Physical Properties ◽  
Tensile Properties ◽  
Oxidation Resistance ◽  
Base Alloy ◽  
Heat Treating ◽  
Nickel Base Alloy ◽  
Hardened Alloy ◽  
Nickel Base

Abstract Altemp 263 alloy is a nickel-base alloy with a strong contribution from cobalt. This age-hardened alloy has superior strength with oxidation resistance to 1095 deg C (2000 deg F) and is used on all forms of turbines. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as creep. It also includes information on forming, heat treating, and joining. Filing Code: Ni-671. Producer or source: Allegheny Ludlum and Allvac.

scholarly journals A High Strength Nickel-Base Alloy With Improved Oxidation Resistance up to 2200 deg F

1968 ◽  
Vol 90 (1) ◽  
pp. 1-10
Author(s):  
W. J. Waters ◽  
J. C. Freche
Keyword(s):  
Heat Treatment ◽  
Weight Gain ◽  
High Temperature ◽  
Oxidation Resistance ◽  
Base Alloy ◽  
High Strength ◽  
Nickel Base Alloy ◽  
Cast Material ◽  
Nickel Base ◽  
Cast Condition

A high strength nickel-base alloy has been developed which compares favorably in oxidation resistance with known high strength nickel-base alloys. The alloy, although basically a cast material, also possesses workability potential. After 310 hr exposure to air at 1900 deg F, the alloy had a weight gain of 1.8 mg/cm2. The total affected zone, oxidized material plus depletion zone, was 0.4 mil. This compares with a weight gain of 3.0 mg/cm2 and a total affected zone depth of 3.3 mils for Rene´ 41 after 100 hr exposure at 1900 deg F. In sheet form after 8 hr at 2200 deg F, its oxidation resistance was approximately the same as that of Rene´ 41 at 1900 deg F. Tensile strengths of the alloy after rolling and heat-treatment ranged from an average of 185,000 psi at 1400 deg F to 3000 psi at 2200 deg F. Maximum elongation was 55 percent and occurred at the latter temperature. At 1900 deg F, average tensile strength was 64,500 psi in the as-cast condition, and 54,000 psi after rolling and heat-treatment. Stress rupture data for low and intermediate stress levels were obtained. In the as-cast condition, use temperatures for 500, 100, and 10-hr life at 15,000 psi are 1815, 1895, and 2010 deg F, respectively. At 8000 psi and 2125 deg F, rupture life was 13 hr and compared favorably with some of the strongest known nickel and cobalt-base alloys. The very good high temperature oxidation resistance, good high temperature strength, and at least limited workability of this alloy suggest that it may be applicable for use in advanced gas turbine engine components.

New Nickel Based Superalloys Development by Vacuum Arc Melting Process Based on Aluminum Addition of GTD-111

2014 ◽  
Vol 1025-1026 ◽  
pp. 455-460 ◽  
Author(s):  
Sureerat Polsilapa ◽  
Panyawat Wangyao ◽  
Pichayakit Boonpou ◽  
Aimamon Promboobpa ◽  
Suvanchai Pongsugitwat
Keyword(s):  
Melting Process ◽  
Vacuum Arc ◽  
Nickel Base Superalloy ◽  
Hardness Tester ◽  
Arc Melting ◽  
Vacuum Arc Melting ◽  
Reheat Treatment ◽  
Al Addition ◽  
Nickel Base ◽  
Al Additions

This research objective is to study the microstructural modification by Al additions in cast nickel base superalloy, GTD-111 by means of vacuum arc melting process. The Al additions to the alloy were 1, 2 and 3% by weight. After that, all casted specimens were performed with different reheat treatment conditions, which consist of solutioning temperatures of 1125°C, 1145°C, 1165°C, 1185°C and 1205°C, respectively, for 6 hours following with precipitation aging at 845°C for 24 hours. After all reheat treatments, the microstructures were investigated and analyzed by SEM. From all obtained results, it was founded that the specimens with Al additions for 1-2%wt. following with reheat treatment show the decrease in size of γ’ precipitated particles when increasing solutioning temperatures. 3%wt. of Al addition was too high content resulting in already improper microstructural characteristics. However all obtained data of area fractions of precipitate phase were almost the same. Effect of Al addition and solutioning temperature did not provide any significant effect in this case. The mechanical property behavior: hardness was investigated by using Vickers hardness tester. It was found that the hardness all was very similar and increased with higher solutioning temperatures.

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