Influence of preliminary cold deformation on the cavitation-corrosion resistance of 12Kh18N9T steel

1986 ◽  
Vol 28 (6) ◽  
pp. 458-461 ◽  
Author(s):  
V. V. Berezovskaya ◽  
Yu. G. Veksler ◽  
N. A. Manakova
Keyword(s):  
Corrosion Resistance ◽  
Cold Deformation ◽  
12Kh18n9t Steel

Eliminating the negative effect of cold deformation on the corrosion resistance of austenitic stainless steel in the presence of a protein

2019 ◽  
Vol 43 (35) ◽  
pp. 13857-13862 ◽  
Author(s):  
Yucong Ma ◽  
Mohd Talha ◽  
Yuanhua Lin ◽  
Ekemini Ituen ◽  
Xiaohong Wang ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
Austenitic Stainless Steel ◽  
Cold Deformation ◽  
Martensite Formation ◽  
Negative Effect

Interaction of proteins with stainless steel subjected to cold deformation. The presence of a protein overcomes the negative effect of martensite formation on corrosion due to its adsorption.

scholarly journals Corrosion Resistance and Pitting Behaviour of Low-Carbon High-Mn Steels in Chloride Solution

2016 ◽  
Vol 61 (2) ◽  
pp. 825-832
Author(s):  
A. Grajcar ◽  
B. Grzegorczyk ◽  
A. Kozłowska
Keyword(s):  
Corrosion Resistance ◽  
Corrosion Behaviour ◽  
Cold Deformation ◽  
Metallic Matrix ◽  
Corrosion Damage ◽  
Austenitic Steels ◽  
Low Carbon ◽  
Deformation Bands ◽  
Cold Worked ◽  
Corrosion Pits

Abstract Corrosion resistance of the X4MnSiAlNbTi27-4-2 and X6MnSiAlNbTi26-3-3 type austenitic steels, after hot deformation as well as after cold rolling, were evaluated in 3.5% NaCl solution using potentiodynamic polarization tests. A type of nonmetallic inclusions and their pitting corrosion behaviour were investigated. Additionally, the effect of cold deformation on the corrosion resistance of high-Mn steels was studied. The SEM micrographs revealed that corrosion damage formed in both investigated steels is characterized by various shapes and an irregular distribution at the metallic matrix, independently on the steel state (thermomechanically treated or cold worked). Corrosion pits are generated both in grain interiors, grain boundaries and along the deformation bands. Moreover, corrosion damage is stronger in cold deformed steels in comparison to the thermomechanically treated specimens. EDS analysis revealed that corrosion pits preferentially nucleated on MnS and AlN inclusions or complex oxysulphides. The morphology of corrosion damage in 3.5% NaCl supports the data registered in potentiodynamic tests.

scholarly journals Improvement in the microhardness and corrosion behaviour of Ti-14Mn biomedical alloy by cold working

2022 ◽  
Author(s):  
Mohammed Gouda ◽  
Salah Salman ◽  
Saad Ebied
Keyword(s):  
Corrosion Resistance ◽  
Cold Rolling ◽  
Corrosion Behaviour ◽  
Cold Deformation ◽  
Solution Treatment ◽  
Inert Atmosphere ◽  
Linear Increase ◽  
Β Phase ◽  
Before And After ◽  
Mechanical Properties And Corrosion

Abstract β-titanium alloys are essential in many applications, particularly biomedical applications. Ti-14Mn β-type alloy was produced using an electric arc furnace from raw alloying elements in an inert atmosphere. The alloy was homogenized at 1000 °C for 8 hr to ensure the complete composition distribution, followed by solution treatment at 900 °C, then quenched in ice water. The alloy was subjected to cold deformation via cold rolling with different ratios: 10, 30, and 90%. The phases change, microstructure, mechanical properties, and corrosion resistance of Ti-14Mn alloys were evaluated before and after cold rolling. The results showed that the β-phase is the only existed phase even after a high degree of deformation. The microstructure shows a combination of twinning and slipping deformation mechanisms in the deformed alloy. Microhardness values indicated a linear increase equal to 30% by increasing the ratio of cold deformation due to the strain hardening effect. The corrosion resistance of Ti-14Mn alloy was doubled after 90% cold rolling.

scholarly journals KARAKTERISTIK MIKROSTRUKTUR DAN FASA PADUAN Zr- 0,3%Nb-0,5%Fe-0,5%Cr PASCA PERLAKUAN PANAS DAN PENGEROLAN DINGIN

2015 ◽  
Vol 21 (2) ◽  
Author(s):  
Sungkono Sungkono ◽  
Masrukan Masrukan
Keyword(s):  
Crystal Structure ◽  
Heat Treatment ◽  
Corrosion Resistance ◽  
Cold Rolling ◽  
Retention Time ◽  
Cold Deformation ◽  
Grain Structure ◽  
Post Heat Treatment ◽  
Heat Treated ◽  
Fuel Elements

KARAKTERISTIK MIKROSTRUKTUR DAN FASA PADUAN Zr-0,3%Nb-0,5%Fe-0,5%Cr PASCA PERLAKUAN PANAS DAN PENGEROLAN DINGIN. Logam paduan Zr-Nb-Fe-Cr dikembangkan sebagai material kelongsong elemen bakar dengan fraksi bakar tinggi untuk reaktor daya maju. Dalam penelitian ini telah dibuat paduan Zr-0,3%Nb-0,5%Fe-0,5%Cr yang mendapat perlakuan panas pada temperatur 650 dan 750°C dengan waktu penahanan 1–2 jam. Tujuan penelitian adalah mendapatkan karakter paduan Zr-0,3%Nb-0,5%Fe-0,5%Cr pasca perlakuan panas dan pengerolan dingin yaitu mikrostruktur, struktur kristal dan fasa-fasa yang ada dalam paduan. Hasil penelitian menunjukkan bahwa paduan Zr-0,3%Nb-0,5%Fe-0,5%Cr pasca perlakuan panas (650ºC, 1-2 jam) mempunyai struktur butir ekuiaksial dengan ukuran butir bertambah besar seiring dengan bertambahnya waktu penahanan. Sementara itu, pasca perlakuan panas (750ºC, 1-2 jam) terjadi perubahan mikrostruktur paduan dari butir ekuiaksial dan kolumnar menjadi butir ekuiaksial lebih besar. Paduan Zr-0,3%Nb-0,5%Fe-0,5%Cr pasca perlakuan panas (650°C, 1 jam) dan (750°C, 1 jam) tidak dapat dirol dingin dengan reduksi tebal 5 – 10%, sedangkan pasca perlakuan panas (650ºC, 2 jam) dan (750°C, 1.5-2 jam) mampu menerima deformasi dingin dengan reduksi ketebalan 5-10% tanpa mengalami keretakan. Senyawa Zr2Fe, ZrCr2 dan FeCr teridentifikai dari hasil uji kristalografi paduan Zr-0,3%Nb-0,5%Fe-0,5%Cr. MICROSTRUCTURE AND PHASE CHARACTERISTICSOF Zr-0.3%Nb-0.5%Fe-0.5%Cr ALLOY POST HEAT TREATMENT AND COLD ROLLING. Zr-Nb-Fe-Cr alloys was developed as fuel elements cladding with high burn up for advanced power reactors. In this research has been made of Zr-0.3% Nb-0.5% Fe-0.5% Cr alloy were heat treated with varying temperatures at650 and 750°C for 1 until 2 hours. The objectives of this research was to obtain the character of Zr-0.3% Nb-0.5% Fe-0.5% Cr alloy post heat treatment and cold rolling, microstructure nomenclature, crystal structure and phases that presents in the alloy. The results of this experiment showed that the microstructures of Zr-0.3% Nb-0.5% Fe-0.5% Cr alloy post heat treatment (650ºC, 1-2 hours) had equiaxial grain structure with an enlarged size with increasing of the retention time. Meanwhile, post heat treatment (750°C, 1-2 hours) occurred the microstructures evolution of alloy from equiaxial and columnar became equiaxial and columnar relatively large, and subsequently became the larger equiaxial grains. Zr-0.3% Nb-0.5% Fe-0.5% Cr alloy post heat treatment (650°C, 2 h) and (750°C, 1.5-2 hours) can undergo cold deformation without cracking when thickness reduction between 5 to 10%.The phases formation of Zr2Fe, ZrCr2 and FeCr compounds can improve the mechanical strength and the corrosion resistance of Zr-0.3% Nb-0.5% Fe-0.5% Cr alloy.

The Effects of Thermo-Mechanical Treatment on the Properties of 2519 Aluminum Alloy

2007 ◽  
Vol 546-549 ◽  
pp. 1027-1032
Author(s):  
Gao Yong Lin ◽  
Zhen Feng Zhang ◽  
Qi Quan Lin ◽  
Da Shu Peng
Keyword(s):  
Corrosion Resistance ◽  
Aluminum Alloy ◽  
Mechanical Treatment ◽  
Ageing Time ◽  
Cold Deformation ◽  
Electrochemical Corrosion ◽  
Processing Parameters ◽  
Deformation Ratio ◽  
Thermo Mechanical Treatment ◽  
Electrochemical Corrosion Resistance

A procedure of thermo-mechanical treatment (TMT) was carried out to 2519 aluminum alloy to improve its properties. The influences of cold deformation ratio, ageing temperature and ageing time of the TMT on the mechanical properties and electrochemical corrosion resistance of this alloy were investigated. The results show that after TMT the tensile strength of 2519 aluminum alloy can be improved obviously but its electrochemical corrosion resistance decreases slightly. The optimum processing parameters of the TMT for 2519 aluminum alloy can be described as: solid solution at 530°Cfor 0.5h, then cold deform with a ratio of 15% followed by aging at 150°C for 10h.

Mechanical Properties and Corrosion Behavior of a Beta Titanium Alloy

2006 ◽  
Vol 324-325 ◽  
pp. 695-698 ◽  
Author(s):  
Yu Feng Zheng ◽  
Bao Lai Wang
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Corrosion Resistance ◽  
Ph Value ◽  
Biomedical Application ◽  
Artificial Saliva ◽  
Cold Deformation ◽  
Open Circuit ◽  
Beta Titanium Alloy ◽  
Beta Titanium

Recently, people devote to the development of beta titanium alloys which have better biocompatibility because of the addition of Mo, Nb, Ta, Zr, Sn, et al. In this paper, the effects of heat treatment and cold roll deformation on the mechanical properties of the Ti-11.3Mo-6.6Zr-4.3Sn alloy (TMZS) are investigated by tensile test. The results show that the excellent combination of strength and ductility can be obtained by heat treatment or cold deformation. The TMZS alloy can obtain intermediate modulus, stronger than nickel titanium, weaker than stainless steel. The corrosion resistance of this alloy in the Hank's solution, 0.9% NaCl physiological solution and artificial saliva with different pH values at 37 are investigated by means of open-circuit potential (OCP), Tafel and potentiodynamic anodic polarization techniques. All the test results suggest that the TMZS alloy has excellent corrosion resistance in the three simulated solutions especially in the artificial saliva and has a large potential for biomedical application. In addition, the pH value and simulated solutions have some influence on the corrosion resistance of the TMZS alloy.

scholarly journals Texture, microhardness and corrosion resistance of 316L stainless steel

10.30544/127 ◽  
2015 ◽  
Vol 21 (1) ◽  
pp. 1-6 ◽  
Author(s):  
A. Bakhtiari ◽  
I. Berenjani
Keyword(s):  
Corrosion Resistance ◽  
316L Stainless Steel ◽  
Cold Deformation ◽  
X Ray Diffraction ◽  
Deformation Degree ◽  
X Ray ◽  
Tafel Polarization ◽  
316L Steel ◽  
Cold Worked ◽  
High Degree

The texture, microhardness, and corrosion resistance of cold worked 316L steel were evaluated. The X-ray diffraction analysis in particular permitted to disclose and identify the main textures variations in the structure of the investigated steel after its deformation within the range 10 - 80%. The corrosion resistance was studied using Tafel polarization tests. It was shown that the increase in deformation degree drastically decreases the relative intensity of {111} planes. Besides, with high degree of cold deformation microhardness increases while corrosion resistance deteriorates.  This article has been retracted. Link to the retraction

Corrosion performance of cold deformed austenitic stainless steels for biomedical applications

2019 ◽  
Vol 37 (4) ◽  
pp. 283-306 ◽  
Author(s):  
Mohd Talha ◽  
Yucong Ma ◽  
Yuanhua Lin ◽  
Yong Pan ◽  
Xiangwei Kong ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Passive Film ◽  
Stainless Steels ◽  
Biomedical Applications ◽  
Failure Modes ◽  
Chromium Content ◽  
Volume Fraction ◽  
Cold Deformation ◽  
Austenitic Stainless Steels ◽  
Localized Corrosion

AbstractAustenitic stainless steels possess an excellent balance of strength and ductility along with the high ability to further raise their strength during cold deformation (CD). Corrosion resistance of austenitic stainless steels (SSs) is affected by cold deformation because passive films on the surface of steels are expected to be modified. A low level of CD enhances the surface diffusion, which results in the formation of a stable passive film leading to an increase in the corrosion resistance in neutral chloride solutions. The chromium content in the passive film on a deformed steel surface is usually richer, with a higher Cr/Fe ratio than that formed on annealed steels. A higher chromium content makes surface films more stable, which improves the corrosion resistance. However, severe CD results in the formation of strain-induced martensite phase and deformation twins, which decreases the localized corrosion resistance by increasing the number of active anodic sites on the surface. The corrosion resistance, especially the pitting resistance, in SSs is diminished with increasing volume fraction of the martensite. In this review, we highlighted the failure modes of corrosion of stainless steel implants, factors affecting corrosion, and effect of CD on mechanical properties and emphatically on the corrosion resistance of SSs for biomedical applications.

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