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Investigation of Thermal Shock Resistance of CeO2 Coating on Titanium Alloy by Magnetron Sputtering

AAA College of Engineering & Techology-Balamurugan Subburaj
Mepco Schlenk Engineering College-Bala Manikandan Cheirmakani, Balamurugan Pandian, Lionel Beneston
  • Technical Paper
  • 2019-28-0103
Published 2019-10-11 by SAE International in United States
Titanium alloy (Grade V) is used in aerospace, medical, marine and chemical processing industries. To improve the thermal shock resistance and corrosion resistance of the titanium alloy at elevated temperatures, Thermal barrier coating (TBC) has been predominantly used. Cerium oxides (CeO2) have been proposed as TBC, due to their high thermal expansion coefficient, higher thermal shock resistance and low corrosion rate. In this study, CeO2 was coated on Titanium alloy by magnetron sputtering. Deposition time was varied as 30 mins, 60 mins and 90 mins respectively, to achieve the variation in thickness of coating. Thickness of the coated specimen was measured by atomic force microscopy and found to be 500 nm, 120 nm and 80 nm respectively. Surface roughness of the corresponding coated surfaces is 152.28 nm, 18.41 nm and 18.65 nm. The Vickers hardness was found to increase with decrease in coating thickness upto certain extent then decreases. Corrosion ability of the coated specimen was identified by electrochemical corrosion test. The coating with lower concentration of particles has the best corrosion properties. Thermal shock…
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Multi Response Optimization on Machining Titanium Alloy Using Taguchi-DEAR Analysis in Abrasive Water Jet Cutting

SRM Institute Of Science And Technology-Muthuramalingam Thangaraj, Akhtar Atif
Tishk International University-Ganesh Babu Loganathan
  • Technical Paper
  • 2019-28-0070
Published 2019-10-11 by SAE International in United States
Abrasive water jet cutting has been proven to be an effective technology for processing various engineering materials. This paper investigated the effects of process parameters on depth of cut in abrasive water jet cutting of titanium alloy. Four different process parameters were undertaken for this study; water pressure, nozzle traverse speed, abrasive mass flow rate and standoff distance. The influence of these process parameters on depth of cut, surface roughness and MRR has been investigated and analyzed. An empirical model for the prediction of depth of cut in abrasive water jet cutting of cast iron has been developed using regression analysis. The approach is based on Taguchi-DEAR method to optimize the AWJM process parameter for effective machining. It has been found that the stand-off-distance has highest impact on performance measures among all process parameters.
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Titanium Alloy Bars, Wire, Forgings, and Rings, 6Al - 4V, Extra Low Interstitial, Annealed

AMS G Titanium and Refractory Metals Committee
  • Aerospace Material Specification
  • AMS4930K
  • Current
Published 2019-10-10 by SAE International in United States
This specification covers a titanium alloy in the form of bars, wire, forgings, flash welded rings 4.000 inches (101.60 mm) and under in nominal diameter or distance between parallel sides, and stock for forging or flash welded rings of any size.
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Products of Tomorrow: September 2019

  • Magazine Article
  • TBMG-35123
Published 2019-09-01 by Tech Briefs Media Group in United States

Nickel Titanium Alloy Ball Bearings

  • Magazine Article
  • TBMG-34909
Published 2019-08-01 by Tech Briefs Media Group in United States

Innovators at NASA's Glenn Research Center have developed a new method for making small-diameter, high-grade ball bearings that are less than 0.25” in diameter thanks to the development of a new alloy made of 57.6% Nickel (Ni), 39.2% Titanium (Ti), and 3.2% Hafnium (Hf). The use of non-corrosive NiTi alloy instead of steel is an inexpensive way to increase the load capability and reduce the weight of a ball bearing.

Effects of Tube Processing on the Fatigue Life of Nitinol: Part 1

  • Magazine Article
  • TBMG-34971
Published 2019-08-01 by Tech Briefs Media Group in United States

With medical devices approved for more demanding cardiovascular applications such as transcatheter aortic and mitral valve repair (TAVR/TMVR), the long-term structural integrity of the substrate remains of paramount concern. With these considerations in mind, much attention has been paid to factors affecting the fatigue life of nitinol in order to ensure long-term device efficacy. High-cycle fatigue life of unique material is of particular interest.2–5

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Steel, Corrosion and Heat Resistant, Bars, Wire, Forgings, Mechanical Tubing, and Rings 12Cr - 0.12Cb (Nb) (410 Modified) Ferrite Controlled, Annealed

AMS F Corrosion Heat Resistant Alloys Committee
  • Aerospace Material Specification
  • AMS5609E
  • Current
Published 2019-07-01 by SAE International in United States
This specification covers an aircraft-quality, corrosion and heat-resistant steel in the form of bars, wire, forgings, mechanical tubing, flash-welded rings, and stock for forging or flash-welded rings.
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Insert - Thin Wall, Self-Locking Short and Long Length Installation and Removal of

E-25 General Standards for Aerospace and Propulsion Systems
  • Aerospace Standard
  • AS3507C
  • Current
Published 2019-07-01 by SAE International in United States
This SAE Aerospace Standard (AS) provides minimum design, installation (by manual and power methods) and removal requirements for AS3504 and AS3505 thin wall inserts and is applicable when specified on engineering drawings or in procurement documents.
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Titanium Alloy, Bars, Wire, and Rings 5Al - 2.5Sn Annealed, 110 ksi (758 MPa) Yield Strength

AMS G Titanium and Refractory Metals Committee
  • Aerospace Material Specification
  • AMS4926P
  • Current
Published 2019-06-20 by SAE International in United States
This specification covers a titanium alloy in the form of bars, wire, flash welded rings 4.000 inches (101.60 mm) and under in nominal diameter or least distance between parallel sides and 16 in2 (103 cm2) and under in cross-sectional area, and stock of any size for flash welded rings.
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Ethylene Propylene Rubber Phosphate Ester Resistant 65 - 75

AMS CE Elastomers Committee
  • Aerospace Material Specification
  • AMS3253B
  • Current
Published 2019-06-17 by SAE International in United States
This specification covers an ethylene propylene elastomer in the form of molded sheet and shapes, color coded purple per ARP1527.
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