scholarly journals Superior Oxidation Resistance Titanium Alloy ARCONIC-THORTM for Aerospace Applications

2020 ◽  
Vol 321 ◽  
pp. 04013
Author(s):  
Sesh Tamirisakandala ◽  
Ernie Crist ◽  
Fusheng Sun ◽  
Matthew Dahar
Keyword(s):  
Titanium Alloy ◽  
High Temperature ◽  
Oxidation Resistance ◽  
Cost Savings ◽  
Jet Engines ◽  
Aerospace Applications ◽  
Technology Advancement ◽  
Aerospace Systems ◽  
Material Systems ◽  
Nickel Base

Next generation fuel-efficient jet engines are running hotter presenting a structural challenge for the exhaust systems and structures adjacent to the engines. A conventional and affordable titanium alloy with superior oxidation resistance provides significant weight reductions and associated cost savings by eliminating the need for high density material systems such as nickel-base superalloys for service temperatures in between current titanium and nickel, enabling major technology advancement in high temperature aerospace applications. This paper presents an overview of Arconic’s engineered material ARCONIC-THORTM to address the needs of future aerospace systems.

ENHANCING HIGH-TEMPERATURE OXIDATION RESISTANCE OF TITANIUM ALLOY WITH KF110-B4C-Ag THROUGH LASER TECHNOLOGY

2021 ◽  
Author(s):  
ZHAO ZHANG ◽  
JIANING LI ◽  
ZHIYUN YE ◽  
CAINIAN JING ◽  
MENG WANG ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
High Temperature ◽  
Oxidation Resistance ◽  
High Temperature Oxidation ◽  
Mass Gain ◽  
Temperature Oxidation ◽  
Laser Technology ◽  
X Ray ◽  
Ta15 Titanium Alloy ◽  
Oxidation Resistant

In this paper, the high-temperature oxidation resistant coating on the TA15 titanium alloy by laser cladding (LC) of the KF110-B4C-Ag mixed powders was analyzed in detail. The scanning electron microscope (SEM) and energy dispersive X-ray spectrometer (EDS) images indicated that a good metallurgy bond between the fabricated coating/TA15 was formed; also the fine/compact microstructure was produced after a cladding process. The oxidation mass gain of TA15 was higher than that of the coating after LC process, which were 3.72 and 0.91[Formula: see text]mg[Formula: see text]cm[Formula: see text], respectively, at 60[Formula: see text]h, greatly enhancing the high temperature oxidation resistance.

Oxidation Resistance of AlPO4Bonded Ceramic Coating Formed on Titanium Alloy for High-Temperature Applications

2014 ◽  
Vol 12 (3) ◽  
pp. 614-624 ◽  
Author(s):  
Hong Tian ◽  
Ya-Ming Wang ◽  
Yu-Feng Zhang ◽  
Li-Xin Guo ◽  
Jia-Hu Ouyang ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
High Temperature ◽  
Oxidation Resistance ◽  
Ceramic Coating ◽  
Temperature Applications

High-Temperature, Cobalt-Tungsten Alloys for Aerospace Applications

1965 ◽  
Vol 87 (1) ◽  
pp. 9-20 ◽  
Author(s):  
J. C. Freche ◽  
R. L. Ashbrook ◽  
G. D. Sandrock
Keyword(s):  
High Temperature ◽  
Rupture Strength ◽  
Rupture Life ◽  
High Stress ◽  
Stress Rupture ◽  
Stress Rupture Life ◽  
Tungsten Alloys ◽  
Aerospace Applications ◽  
Temperature Capability ◽  
Nickel Base

The high-temperature capability and workability of cobalt-tungsten alloys for aerospace applications is discussed. The average life at 1850 F and 15,000 psi of the strongest previously reported alloy, Co-25 W-1Ti-1Zr-0.4C, was doubled from 92 to 185 hr by small additions of chromium and rhenium. At 2200 F and 5000 psi, the strongest alloy, Co-25W-1Ti-1Zr-3Cr-2Re-0.4C, had a rupture life of 23 hr; the elevated-temperature rupture strength compared favorably with the strongest available conventional (high-chromium) cobalt-base alloys. Above approximately 2035 F and at reasonably high stress levels (10,000 and 15,000 psi), its stress-rupture life also exceeded those of the strongest known nickel-base alloys, including the NASA tantalum-modified alloy and SM-200. It is particularly significant that even the strongest alloys of this series were readily hot-rolled. Ingots 1/2 in. thick were reduced to 0.065-in. sheet and subsequently cold-rolled to 0.0125-in. sheet. Elongations as high as 31 percent were obtained at room temperature with annealed sheet specimens. The good ductility obtained suggests that these alloys could be fabricated into complex shapes required for various aerospace and other applications. Although the strongest alloys had a chromium content of only 3 percent, they did not oxidize catastrophically in air.

scholarly journals Laser Oscillating Welding of TC31 High-Temperature Titanium Alloy

Metals ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1185
Author(s):  
Zhimin Wang ◽  
Lulu Sun ◽  
Wenchao Ke ◽  
Zhi Zeng ◽  
Wei Yao ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Titanium Alloy ◽  
High Temperature ◽  
Laser Welding ◽  
Room Temperature ◽  
Base Material ◽  
Aerospace Applications ◽  
Weld Appearance ◽  
Laser Welds

The joining of high-temperature titanium alloy is attracting much attention in aerospace applications. However, the defects are easily formed during laser welding of titanium alloys, which weakens the joint mechanical properties. In this work, laser oscillating welding was applied to join TC31 high-temperature titanium alloy. The weld appearance, microstructure and mechanical properties of the laser welds were investigated. The results show that sound joints were formed by using laser oscillating welding method, and a large amount of martensite was presented in the welds. High mechanical properties were achieved, which was approaching to (or even equaled) the strength of the base material. The joints exhibited a tensile strength of up to 1200 ± 10 MPa at room temperature and 638 ± 6 MPa at 923 K. Laser oscillating welding is beneficial to the repression of porosity for welding high-temperature titanium alloy.

Study on Properties of Al2TiO5 Coating on Ti-6Al-4V Titanium Alloy

2013 ◽  
Vol 575-576 ◽  
pp. 348-351
Author(s):  
Nian Suo Xie ◽  
Jin Wang
Keyword(s):  
Corrosion Resistance ◽  
Titanium Alloy ◽  
Sulfuric Acid ◽  
High Temperature ◽  
Oxidation Resistance ◽  
High Temperature Oxidation ◽  
Acid Corrosion ◽  
Temperature Oxidation ◽  
Micro Arc Oxidation ◽  
Sulfuric Acid Corrosion

The Al2TiO5Coating was deposited on Ti-6Al-4V alloy substrate by homemade micro-arc oxidation system. The microstructure of Ti-6Al-4V titanium alloy, the phase of coating, the bonding force of the coating and matrix, sulfuric acid corrosion resistance and high-temperature oxidation resistance were study by inverted microscope model, Xray diffract meter, scanning electron microscopy, the coating adhesion automatic scratch tester, box-type furnace. The results show that the phase of coating is composed of Al2TiO5and Al2SiO5, and Al2TiO5.is the main component, the coating surface consists of discharging pit and flange which are unequal in size, rough and overlap and micro-arc oxidation pit diameter increases with the voltage. When micro-arc oxidation voltage is constant, the longer micro-arc oxidation time, the greater the Ti-6Al-4V alloy coating and the substrate binding force. The corrosion resistance of Ti-6Al-4V alloy was improved in sulfuric acid due to micro-arc oxidation; the sulfuric acid corrosion resistance of the coated samples was improved 11 times when the micro-arc oxidation time increased from 5min to 60min. the high-temperature oxidation resistance of Ti-6Al-4V alloy with micro-arc oxidation coatings is higher than Ti-6Al-4V alloy without micro-arc oxidation coating.

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.

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