Effect of plastic deformation on the rate of the anodic process in austenitic stainless steels

1974 ◽  
Vol 10 (4) ◽  
pp. 374-375
Author(s):  
V. V. Gerasimov ◽  
V. A. Shuvalov ◽  
S. A. Andreeva ◽  
Yu. V. Andreev
Keyword(s):  
Plastic Deformation ◽  
Stainless Steels ◽  
Austenitic Stainless Steels ◽  
Anodic Process

scholarly journals Plastic Deformation Influence on Intrinsic Magnetic Field of Austenitic Biomaterials

2016 ◽  
Vol 67 (6) ◽  
pp. 407-413
Author(s):  
Milan Smetana ◽  
Klára Čápová ◽  
Vladimír Chudáčik ◽  
Peter Palček ◽  
Monika Oravcová
Keyword(s):  
Magnetic Field ◽  
Plastic Deformation ◽  
Austenitic Steel ◽  
Medical Practice ◽  
Stainless Steels ◽  
Austenitic Stainless Steels ◽  
Intrinsic Magnetic Field ◽  
Fluxgate Sensor ◽  
Non Destructive Evaluation ◽  
Non Destructive

Abstract This article deals with non-destructive evaluation of austenitic stainless steels, which are used as the biomaterials in medical practice. Intrinsic magnetic field is investigated using the fluxgate sensor, after the applied plastic deformation. The three austenitic steel types are studied under the same conditions, while several values of the deformation are applied, respectively. The obtained results are presented and discussed in the paper.

Reduction in Fretting Fatigue Strength of Austenitic Stainless Steels due to Internal Hydrogen

2014 ◽  
Vol 891-892 ◽  
pp. 891-896 ◽  
Author(s):  
Ryosuke Komoda ◽  
Naoto Yoshigai ◽  
Masanobu Kubota ◽  
Jader Furtado
Keyword(s):  
Plastic Deformation ◽  
Fatigue Strength ◽  
Crack Initiation ◽  
Stainless Steels ◽  
Austenitic Stainless Steels ◽  
Fretting Fatigue ◽  
Hydrogen Gas ◽  
Gaseous Hydrogen ◽  
Internal Hydrogen ◽  
Major Factors

Fretting fatigue is one of the major factors in the design of hydrogen equipment. The effect of internal hydrogen on the fretting fatigue strength of austenitic stainless steels was studied. The internal hydrogen reduced the fretting fatigue strength. The reduction in the fretting fatigue strength became more significant with an increase in the hydrogen content. The reason for this reduction is that the internal hydrogen assisted the crack initiation. When the fretting fatigue test of the hydrogen-charged material was carried out in hydrogen gas, the fretting fatigue strength was the lowest. Internal hydrogen and gaseous hydrogen synergistically induced the reduction in the fretting fatigue strength of the austenitic stainless steels. In the gaseous hydrogen, fretting creates adhesion between contacting surfaces where severe plastic deformation occurs. The internal hydrogen is activated at the adhered part by the plastic deformation which results in further reduction of the crack initiation limit.

scholarly journals Effect of Nitrogen Implantation on the Structure and Properties of Austenitic Corrosion-Resistant Steels

2019 ◽  
Vol 1 (1) ◽  
pp. 41
Author(s):  
D.S. Asanova ◽  
A.S. Vasiliev ◽  
N.N. Ozerets ◽  
V.V. Berezovskaya ◽  
M.A. Pavlov
Keyword(s):  
Plastic Deformation ◽  
Radiation Dose ◽  
Stainless Steels ◽  
Austenitic Stainless Steels ◽  
Cold Plastic Deformation ◽  
Corrosive Environment ◽  
Structure And Properties ◽  
Nitrogen Implantation ◽  
Corrosion Resistant ◽  
Nitrogen Ions

Work is devoted to studying the effect of implantation of nitrogen ions into the surfaceof austenitic stainless steels to improve their functional properties. Four grades ofaustenitic corrosion-resistant steels 02H16N10M2, 08H15AG10D2, 06H15AG9NM2 and09H15AG9ND2 were taken after cold plastic deformation and annealing from 680 ∘Cin water and subsequent implantation with N+ ions with different radiation dose: 0,01 и0,1%. It was found that irradiation of austenitic stainless steels with nitrogen ions can beconsidered an effective way to increase the hardness and yield strength of steels in theoperation in a corrosive environment.

Hydrogen Effect on the Deformation Behavior of Austenitic Stainless Steels Investigated by Nanoindentation

2017 ◽  
Author(s):  
Lin Zhang ◽  
Yuanjian Hong ◽  
Jinyang Zheng ◽  
Bai An ◽  
Chengshuang Zhou
Keyword(s):  
Plastic Deformation ◽  
Stainless Steels ◽  
Deformation Behavior ◽  
Austenitic Stainless Steels ◽  
Gaseous Hydrogen ◽  
Hydrogen Effect ◽  
Full Understanding ◽  
Stiffness Measurement ◽  
Initial Stage ◽  
Continuous Stiffness Measurement

A full understanding of hydrogen effect on deformation is important to reveal the mechanism of hydrogen embrittlement. The effects of thermal gaseous hydrogen charging on 304 and 310S austenitic stainless steels have been examined by using nanoindentation. It is first found by using nanoindentation continuous stiffness measurement that hydrogen decreases the elastic modulus and increases the hardness in the initial stage of plastic deformation, while the hydrogen effect becomes weaker and remains nearly constant with further plastic deformation. Hydrogen increases the creep displacement in 310S steel, which indicates that hydrogen facilitates ambient creep. α′ martensite restrains the nanoindentation creep and hydrogen has little effect on the creep induced by α′ martensite.

scholarly journals Basic Creep-Fatigue Models Considering Cavitation

2021 ◽  
Author(s):  
Rolf Sandström
Keyword(s):  
Growth Rate ◽  
Plastic Deformation ◽  
Stainless Steels ◽  
Dynamic Recovery ◽  
Cavity Growth ◽  
Hysteresis Loops ◽  
Austenitic Stainless Steels ◽  
Rupture Data ◽  
Creep Fatigue ◽  
Parameter Values

AbstractCavitation plays a central role during creep-fatigue. During recent years, fundamental models for initiation and growth of creep cavities that do not involve any adjustable parameters have been developed. These models have successfully been used to predict creep rupture data for austenitic stainless steels again without using adjustable parameters. However, it appears that basic models have not yet been applied to creep-fatigue assessments. A summary of the fundamental cavitation models is given. A model for monotonous deformation is transferred to cyclic loading. The parameter values are kept except that the dynamic recovery constant is raised due to increased interactions between dislocations during cycling. This model is successfully compared with observed LCF and TMF hysteresis loops. A new model for cavity growth due to plastic deformation is presented. The model is formulated in such a way that the condition for constrained growth is automatically satisfied. In this way, it is avoided to overestimate the growth rate.

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