scholarly journals nvestigation of Morphology of Ti-6Al-7Nb after sulphuric anodizing

10.18048/5306 ◽  
2017 ◽  
Vol 53 (1) ◽  
pp. 85-91
Author(s):  
Momchil Manov
Keyword(s):  
Mechanical Properties ◽  
Corrosion Resistance ◽  
Titanium Alloy ◽  
Structural Analysis ◽  
Quality Assessment ◽  
Surface Treatment ◽  
Xrd Analysis ◽  
Unique Combination ◽  
Eds Analysis ◽  
Excellent Corrosion Resistance

Titanium alloys possess unique combination of good mechanical properties and excellent corrosion resistance which make them an attractive material for application in many engineering areas. Along with these properties there are some disadvantages which can be eliminated successfully using different surface treatment methods. One of the most commonly used among them is anodizing. This article presents investigation of the results obtained from anodizing titanium alloy Ti-6Al-7Nb using sulphuric acid. The quality assessment and morphology of the anodized layer is made using a micro structural analysis, EDS analysis, XRD analysis and microhardness measurements.

Measurement of Alloying Degree of Galvannealed Steels by X-Ray Diffraction

2006 ◽  
Vol 321-323 ◽  
pp. 1461-1464 ◽  
Author(s):  
Hyoung Kuk Park ◽  
Jea Hwa Hong ◽  
Chong Soo Lee
Keyword(s):  
Mechanical Properties ◽  
Corrosion Resistance ◽  
Quantitative Analysis ◽  
Xrd Analysis ◽  
Pls Regression ◽  
Processing Conditions ◽  
X Ray Diffraction ◽  
X Ray ◽  
Excellent Corrosion Resistance ◽  
Galvannealed Steel

Galvannealed steels are produced by reheating of Zinc-coated steels, in which the iron and the zinc are interdiffused to form Zn-Fe intermatallic compound. In recent years, application of galvannealed steel has increased due to its excellent corrosion resistance, good weldability and paintability. Galvannealed production requires strict control of processing conditions to obtain an optimal alloying degree in the coatings. The analysis of the alloying degree is very important since they are closely related to the corrosion and mechanical properties. This study is measurement of alloying degree of the galvannealed steel by using the XRD. Partial least squares (PLS) model is a powerful multivariate tool that has been successfully applied to the quantitative analysis of data in XRD. The alloying degree was determined by using PLS regression to a concentration accuracy of 0.2%. The XRD analysis and proposed PLS model can be successfully used to determine the alloying degree of industrially produced galvannealed steel.

KAISER ALUMINUM ALLOY KA62

Alloy Digest ◽  
1999 ◽  
Vol 48 (10) ◽  
Keyword(s):  
Mechanical Properties ◽  
Corrosion Resistance ◽  
Shear Strength ◽  
Aluminum Alloy ◽  
Physical Properties ◽  
Surface Treatment ◽  
Physical And Mechanical Properties ◽  
Heat Treating ◽  
Lead Free ◽  
Kaiser Aluminum

Abstract Kaiser Aluminum alloy KA62 (Tennalum alloy KA62) is a lead-free alternative to 6262. It offers good machinability and corrosion resistance and displays good acceptance of coatings (anodize response). It can be used in place of 6262 because its physical and mechanical properties are equivalent to those of 6262 (see Alloy Digest Al-361, September 1999). This datasheet provides information on composition, physical properties, hardness, tensile properties, and shear strength. It also includes information on corrosion resistance as well as forming, heat treating, machining, and surface treatment. Filing Code: AL-362. Producer or source: Tennalum, A Division of Kaiser Aluminum.

VDM LC-NICKEL 99.2

Alloy Digest ◽  
1996 ◽  
Vol 45 (3) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Physical Properties ◽  
Surface Treatment ◽  
Carbon Content ◽  
Tensile Properties ◽  
Heat Treating ◽  
Alkaline Media ◽  
Excellent Corrosion Resistance

Abstract VDM LC-Nickel 99.2 is unalloyed nickel which offers excellent corrosion resistance in many alkaline media. The metal also has good mechanical, magnetic, and magnetostrictive properties. It has a reduced carbon content to avoid graphitization at temperatures above 570 deg F (300 deg C). This datasheet provides information on composition, physical properties, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: Ni-502. Producer or source: VDM Technologies Corporation.

TITANIUM 1Al-8V-5Fe

Alloy Digest ◽  
1968 ◽  
Vol 17 (2) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Titanium Alloy ◽  
High Temperature ◽  
Physical Properties ◽  
Surface Treatment ◽  
Tensile Properties ◽  
Heat Treating ◽  
Temperature Performance ◽  
Reactive Metals

Abstract Titanium IA1-8V-5Fe is an all beta type titanium alloy recommended for high temperature fasteners. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as creep and fatigue. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: Ti-55. Producer or source: Reactive Metals Corporation.

Ti-140A

Alloy Digest ◽  
1962 ◽  
Vol 11 (1) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Titanium Alloy ◽  
Shear Strength ◽  
High Temperature ◽  
Physical Properties ◽  
Surface Treatment ◽  
Tensile Properties ◽  
Heat Treating ◽  
Temperature Performance ◽  
Iron Chromium

Abstract Ti-104A is a titanium alloy containing about 2% each of iron, chromium and molybdenum. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and shear strength. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: Ti-5. Producer or source: Titanium Metals Corporation of America. Originally published July 1954, revised January 1962.

scholarly journals Effect of Molybdenum Content on the Corrosion and Microstructure of Low-Ni, Co-Free Maraging Steels

Metals ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 852
Author(s):  
Asiful H. Seikh ◽  
Hossam Halfa ◽  
Mahmoud S. Soliman
Keyword(s):  
Corrosion Resistance ◽  
Electrochemical Impedance ◽  
Microstructural Analysis ◽  
Xrd Analysis ◽  
X Ray Diffraction ◽  
Alloying Element ◽  
X Ray ◽  
Maraging Steels ◽  
Eds Analysis ◽  
Electroslag Refining

Molybdenum (Mo) is an important alloying element in maraging steels. In this study, we altered the Mo concentration during the production of four cobalt-free maraging steels using an electroslag refining process. The microstructure of the four forged maraging steels was evaluated to examine phase contents by optical microscopy, scanning electron microscopy (SEM), and X-ray diffraction (XRD) analysis. Additionally, we assessed the corrosion resistance of the newly developed alloys in 3.5% NaCl solution and 1 M H2SO4 solution through potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) techniques. Furthermore, we performed SEM and energy-dispersive spectroscopy (EDS) analysis after corrosion to assess changes in microstructure and Raman spectroscopy to identify the presence of phases on the electrode surface. The microstructural analysis shows that the formation of retained austenite increases with increasing Mo concentrations. It is found from corrosion study that increasing Mo concentration up to 4.6% increased the corrosion resistance of the steel. However, further increase in Mo concentration reduces the corrosion resistance.

Plasma Surface Treatment: Effects on Mechanical and Corrosion Protection Properties of Hybrid Sol–Gel Coatings

2019 ◽  
Author(s):  
R. Subasri
Keyword(s):  
Mechanical Properties ◽  
Corrosion Resistance ◽  
Surface Treatment ◽  
Corrosion Protection ◽  
Sol Gel ◽  
Surface Cleaning ◽  
Al Alloys ◽  
Plasma Surface ◽  
Wet Chemical ◽  
Pre Treatment

Surface cleaning and activation of substrates are two critical processes that affect the mechanical and corrosion resistance properties of protective coatings when deposited on the substrates. Surface cleaning removes the contaminants, for example, grease on the substrate, and surface activation introduces active bonds on the substrate thereby increasing the surface free energy. Conventionally, surface cleaning and activation of aluminum and its alloys are carried out by a wet chemical technique. A convenient and safe alternate to the wet chemical cleaning/activation would be to use plasma for the same purpose. Plasma surface pre-treatment greatly improves adhesion of coatings deposited, which is very vital for good corrosion protection and mechanical properties such as scratch and abrasion resistance. Cold and atmospheric air plasma treatments have been the most widely studied pre-treatments for Al alloys. This article will discuss the advancements in the use of plasma treatment on Al/Al alloys and its effect on corrosion resistance and mechanical properties of coatings deposited after the surface treatment.

Newly Formed Bone around Implanted New Titanium Alloy: Ti-15%Zr-4%Nb-4%Ta

2007 ◽  
Vol 361-363 ◽  
pp. 661-664
Author(s):  
Hiroshi Nakada ◽  
Yasuko Numata ◽  
Taketoshi Suwa ◽  
Y. Okazaki ◽  
Racquel Z. LeGeros ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Bone Mineral Density ◽  
Titanium Alloy ◽  
Surface Treatment ◽  
Bone Mineral ◽  
Ti Alloy ◽  
Micro Ct ◽  
Mineral Density ◽  
Biological Safety ◽  
Biological Performance

We have developed a new Ti alloy, Ti-15%Zr-4%Nb-4%Ta alloy (Ti-15-4-4) that showed higher biological safety and mechanical properties than the currently used Ti-6%Al-4%V alloy. The purpose of this study is to determine the biological performance of the new alloy. Ti-15-4-4 implants (machined or blasted) were placed in surgically created defects in rabbit femurs. The rabbits were sacrificed after 4, 8, 16, 24 and 48 weeks. Bone mineral density (BMD) and area of newly formed bone around the implants were measured using micro-CT. Results showed that the Ti-15-4-4 alloy is biocompatible and forms new bone around the Ti-15-4-4 implant, regardless of the surface treatment. The BMD and area of newly formed bone around the blasted implant surfaces were significantly greater than those around the machined surfaces. These results indicate that the new Ti-15-4-4 alloy has a potential for use as implants and has the advantage of improved mechanical properties described in earlier studies.

Effecting Factors on Conductivity of EG/VER Conductive Composite

2013 ◽  
Vol 833 ◽  
pp. 322-325 ◽  
Author(s):  
Hua Yong Zhang ◽  
Hua Xu ◽  
Cong Sheng Guan
Keyword(s):  
Mechanical Properties ◽  
Corrosion Resistance ◽  
Vinyl Ester ◽  
Expanded Graphite ◽  
Bipolar Plate ◽  
Vinyl Ester Resin ◽  
Soaking Time ◽  
Conductive Composites ◽  
Excellent Corrosion Resistance ◽  
Lower Viscosity

Vinyl ester resin (VER) has excellent corrosion resistance, mechanical properties, and lower viscosity before curing. In this article low filled conductive composites were fabricated with expanded graphite (EG) and vinyl ester resin (VER). The influences of soaking time, rabbling intensity, the EG content and the coupling agent dosage on the electric conductivity were investigated. The results can provide good reference for the following bipolar plate researches.

Investigation in the Influence of Surface Treatment on Mechanical and Electrochemical Corrosion Properties of Ti-6Al-4V Alloy

2017 ◽  
Vol 893 ◽  
pp. 350-353 ◽  
Author(s):  
Zhe Rui Huang ◽  
Yu Lin Li ◽  
Qing Dong Zhong ◽  
Chen Xiao ◽  
Hui Li ◽  
...  
Keyword(s):  
Mechanical Property ◽  
Corrosion Resistance ◽  
Titanium Alloy ◽  
Surface Treatment ◽  
Electrochemical Corrosion ◽  
Compound Layer ◽  
Cell Reaction ◽  
Corrosion Properties ◽  
Layer Sample ◽  
Two Phases

Potential difference between two phases in the Ti-6Al-4V alloy results in the galvanic cell reaction and corrosion. In order to improve the properties of Ti-6Al-4V, it was treated under different temperature with the atmosphere of 5vol. % oxygen and 95 vol. % nitrogen. The results showed that the titanium alloy surface is formed a layer of oxide and nitride compound layer. Sample treated at the temperature of 800°C had the most outstanding corrosion resistance and mechanical property.

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