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Book Effect of Heat Treatment on the Corrosion Behavior of SS316 Stainless Steel in Simulated Body Environment

Download or read book Effect of Heat Treatment on the Corrosion Behavior of SS316 Stainless Steel in Simulated Body Environment written by Mohd Asyraf Che Azmi and published by . This book was released on 2010 with total page 65 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis is entitled about the effect of heat treatment on corrosion behavior on SS316 stainless steel in simulated body environment. Biomedical materials are very important in the modern world to manufacture the variety of prosthetic devices which are the artificial replacements for human body. These artificial replacements are use in a biological system such as the human body in an effort to provide the function of the original parts. When a metal device is implanted into human body, it is continually exposed to extracellular tissue fluid. This interaction can lead to either failure of the implant or have an adverse effect on the patient resulting in the rejection of the implant by the surrounding tissue or both. The objective of this project is to investigate the effect of stress relief on corrosion behavior of SS316 stainless steel in simulated body fluid. Stress relief had been performed to the sample with two different time and temperature. Stress relief is used to relieve stresses that remain locked in a structure as a consequence of a manufacturing sequence such as machining. The sample was prepared for electrochemical test. Electrochemical tests using a potentiostat WPG1000 have also been conducted and reported in this thesis. The corrosion rates of the alloys were then compared.

Book The Influence of Heat Treatment on Corrosion Behavior of Martensitic Stainless Steel UNS 42670

Download or read book The Influence of Heat Treatment on Corrosion Behavior of Martensitic Stainless Steel UNS 42670 written by Armen Kvryan and published by . This book was released on 2019 with total page 171 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Ceaseless demand for lighter, faster, and more efficient aircraft has been one of the greatest driving forces behind bearing steel innovations. Recent studies demonstrate that corrosion is one of the leading causes of bearing failure in both military and commercial aircraft. High-performing bearing steels are available but are not being used in US military applications due to high cost and security issues when steels are produced outside of the continental United States. One approach to address this issue is to engineer steels that are cost-efficient and heat treated for corrosion resistance, long wear life, etc. This dissertation presents information on the effects of heat treatment on bearing steels, specifically UNS 42670 (Pyrowear 675, or simply P675). P675 is a martensitic stainless steel (MSS) engineered for use in the aerospace industry. Through proprietary heat treatments, P675 can be transformed from a mediocre performing steel to one which can withstand fatigue more than all other steels in its class, while maintaining acceptable corrosion resistance. Here we demonstrate the effects of heat treatments on the new generation of bearing steels to inform and aid steel developers in designing cost-efficient steels that can provide superior corrosion resistance while maintaining required tribological performance. Samples studied were heat treated using three different methods; High temperature tempering (HTT), Low temperature tempering (LTT), and Carbo-Nitriding (CN). This study was initiated to test the following hypotheses: Electrochemical techniques (i.e. anodic polarization (AP), electrochemical impedance spectroscopy (EIS)) will yield faster and more accurate results than conventional corrosion testing methods for screening bearing steels for corrosion behavior. HTT samples will have the lowest corrosion resistance due to a larger depletion of chromium from the matrix experienced at the highest tempering temperature which will lead to the highest microgalvanic couple between the carbides and matrix. CN will have the highest corrosion resistance from the steels tested due to the addition of nitrogen and encouraged passivation at the oxide/metal interface. The objective of this dissertation is to understand and explain the implications of heat treatments on the newest and upcoming generation of MSS. A combination of accelerated corrosion testing, modeling, and nanoscale surface analysis was used to determine corrosion mechanism and provide recommendations. Key results from this study include the following: Corrosion performance of P675 is highly dependent on heat treatment where CN outperforms all three heat treatments for corrosion testing, while HTT has the lowest corrosion resistance. EIS data was fitted to an equivalent circuit and a mechanism of corrosion attack was proposed for each of the bearing steels studied where HTT experienced general corrosion attack while LTT and CNN pitting corrosion."--Boise State University ScholarWorks.

Book Effect of Heat Treatment Composition and Microstructure on Corrosion of 18 Cr 8Ni Ti Stainless Steels in Acids

Download or read book Effect of Heat Treatment Composition and Microstructure on Corrosion of 18 Cr 8Ni Ti Stainless Steels in Acids written by M. A. Streicher and published by . This book was released on 1965 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: Titanium additions to 18Cr-8Ni steels can effectively eliminate susceptibility to intergranular attack associated with the precipitation of chromium carbides. However, these additions also drastically reduce the grain size of these steels and promote the formation of sigma phase. Both of these factors modify the behavior of titanium-stabilized steels in corrosive environments. A detailed investigation of the influence of heat treatment and microstructure on the corrosion resistance of four titanium-stabilized, AISI 321, heats is described.

Book An Study of the Corrosion Behavior of Cold Worked Austenitic Stainless Steels Exposed to a Simulated Marine industrial Environment

Download or read book An Study of the Corrosion Behavior of Cold Worked Austenitic Stainless Steels Exposed to a Simulated Marine industrial Environment written by Alejandro Rodriguez Gratacos and published by . This book was released on 1973 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book The Effect of Heat Treatment on the Interangular Corrosion Behaviour of a Niobium stabilized 25Cr20Ni Austenitic Stainless Steel

Download or read book The Effect of Heat Treatment on the Interangular Corrosion Behaviour of a Niobium stabilized 25Cr20Ni Austenitic Stainless Steel written by Brian.* Nelson and published by . This book was released on 1989 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Effect of Heat Treatment and Welding on Corrosion Resistance of Austenitic Stainless Steels

Download or read book Effect of Heat Treatment and Welding on Corrosion Resistance of Austenitic Stainless Steels written by J. R. Auld and published by . This book was released on 1965 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: The thermal effects of annealing, sensitization and welding on the resistance to corrosion by plant process solutions were determined for nine stainless steel alloys. Field corrosion information from exposure of 1200 test coupons is recorded and correlated with the 240-hour boiling 65 percent nitric acid test. The results show (1) general corrosion and pitting as well as intergranular corrosion can be accelerated in certain solutions by improper heat treatment and welding; many solutions do not cause accelerated corrosion of improperly heat treated stainless steels; (2) the boiling 65 percent nitric acid test is a satisfactory quality test for Types 302, 304, 304L, 347, 316 and 317 stainless steels, but is not a satisfactory quality test for Types 321, 316L and 318 stainless steels; and (3) single-pass welds on 1/8-inch thick material will cause severe intergranular corrosion in only a very few instances.

Book Mechanical Behaviour and Nuclear Applications of Stainless Steel at Elevated Temperatures

Download or read book Mechanical Behaviour and Nuclear Applications of Stainless Steel at Elevated Temperatures written by Metals Society and published by Ashgate Publishing. This book was released on 1982 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Effect of Surface Condition and Heat Treatment on Corrosion of Type 316L Stainless Steel in a Mercury Thermal Convection Loop

Download or read book Effect of Surface Condition and Heat Treatment on Corrosion of Type 316L Stainless Steel in a Mercury Thermal Convection Loop written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Two thermal convection loops (TCLs) fabricated from 316L stainless steel and containing mercury and a variety of 316L coupons representing variable surface conditions and heat treatments have been operated continuously for 2000 h. Surface conditions included surface ground, polished, gold-coated, chemically etched, bombarded with Fe to simulate radiation damage, and oxidized. Heat treatments included solution treated, welded, and sensitized. In addition, a nitrogen doped 316L material, termed 316LN, was also examined in the solution treated condition. Duplicate TCLs were operated in this experiment--both were operated with a 305 C peak temperature, a 65 C temperature gradient, and mercury velocity of 1.2 m/min--but only one included a 36 h soak in Hg at 310 C just prior to operation to encourage wetting. Results indicate that the soak in Hg at 310 C had no lasting effect on wetting or compatibility with Hg. Further, based on examination of post-test wetting and coupon weight loss, only the gold-coated surfaces revealed significant interaction with Hg. In areas wetted significantly by Hg, the extreme surface of the stainless steel (ca 10[micro]m) was depleted in Ni and Cr compared to the bulk composition.

Book Effect of Surface Treatment on the Corrosion Behavior of Type 304 Stainless Steel in 10 Percent Sulfuric Acid

Download or read book Effect of Surface Treatment on the Corrosion Behavior of Type 304 Stainless Steel in 10 Percent Sulfuric Acid written by Lloyd Frank Lockwood and published by . This book was released on 1955 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Effects of Heat Treatment Parameters on Corrosion Resistance and Phase Transformation of Martensitic Stainless Steel

Download or read book Effects of Heat Treatment Parameters on Corrosion Resistance and Phase Transformation of Martensitic Stainless Steel written by Aizuddin Supee and published by . This book was released on 2008 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Corrosion of Stainless Steels

Download or read book Corrosion of Stainless Steels written by A. John Sedriks and published by John Wiley & Sons. This book was released on 1996-04-19 with total page 467 pages. Available in PDF, EPUB and Kindle. Book excerpt: A Complete, Up-to-Date Introduction to Corrosion of StainlessSteels and Metallurgical Factors This fully updated Second Editionof Corrosion of Stainless Steels covers the tremendous advancesmade with stainless steels in recent decades, includingapplications in many new areas--from marine technologies andoff-shore oil production to power plants and the kitchen sink. Thisbook offers unique insights into the corrosion mechanisms affectingstainless steels, details problem-avoidance strategies, and helpsidentify corrosion-resistant capabilities for these remarkablealloys Sponsored by the Electrochemical Society, Corrosion osStainless Steels * Provides a comprehensive introduction to the selection,development, and production of all types of stainless steels * Emphasizes how metallurgical factors affect corrosionresistance * Examines the limitations of stainless steels within the contextof a discussion on higher alloys * Takes an interdisciplinary approach that demonstrates thecombined effects of metallurgy, chemistry, and electrochemistry oncorrosion resistance * Provides baseline knowledge and testing standards for stainlesssteels, and facilitates failure analysis for industrial purposes orlitigation related to equipment failure This is a much-needed text for materials scientists, chemicalengineers, corrosion specialists, graduate students, and anyone whoneeds to be brought up to date on this subject.