Mechanical behaviour of 31 6L stainless steel under warm working conditions

2003 ◽  
Vol 19 (2) ◽  
pp. 189-194 ◽  
Author(s):  
E. S. Puchi-Cabrera
Keyword(s):  
Stainless Steel ◽  
Working Conditions ◽  
Mechanical Behaviour ◽  
Warm Working

40 years old LNG stainless steel pipeline: Characterization and mechanical behaviour

2017 ◽  
Vol 79 ◽  
pp. 876-888 ◽  
Author(s):  
Javier Sanchez ◽  
Oscar Galao ◽  
Julio Torres ◽  
Jose Fullea ◽  
Carmen Andrade ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Mechanical Behaviour ◽  
Steel Pipeline

scholarly journals Microscale residual stresses in additively manufactured stainless steel

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
Wen Chen ◽  
Thomas Voisin ◽  
Yin Zhang ◽  
Jean-Baptiste Florien ◽  
Christopher M. Spadaccini ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Residual Stresses ◽  
Mechanical Behaviour ◽  
Work Hardening ◽  
Computational Modelling ◽  
Internal Stresses ◽  
X Ray Diffraction ◽  
Lattice Strains ◽  
The Impact

Abstract Additively manufactured (AM) metallic materials commonly possess substantial microscale internal stresses that manifest as intergranular and intragranular residual stresses. However, the impact of these residual stresses on the mechanical behaviour of AM materials remains unexplored. Here we combine in situ synchrotron X-ray diffraction experiments and computational modelling to quantify the lattice strains in different families of grains with specific orientations and associated intergranular residual stresses in an AM 316L stainless steel under uniaxial tension. We measure pronounced tension–compression asymmetries in yield strength and work hardening for as-printed stainless steel, and show they are associated with back stresses originating from heterogeneous dislocation distributions and resultant intragranular residual stresses. We further report that heat treatment relieves microscale residual stresses, thereby reducing the tension–compression asymmetries and altering work-hardening behaviour. This work establishes the mechanistic connections between the microscale residual stresses and mechanical behaviour of AM stainless steel.

Identification and Modelling of the Behaviour of a Duplex Stainless Steel by Methods of Scale Changing

2005 ◽  
Vol 482 ◽  
pp. 231-234 ◽  
Author(s):  
Suzanne Degallaix ◽  
Florence Jaupitre ◽  
Djimedo Kondo ◽  
Philippe Quaegebeur ◽  
Pierre Forget
Keyword(s):  
Stainless Steel ◽  
Duplex Stainless Steel ◽  
Mechanical Behaviour ◽  
Linear Models ◽  
Constant Strain Rate ◽  
Young Modulus ◽  
Tensile Tests ◽  
Selective Dissolution ◽  
Austenitic Phase ◽  
Non Linear

In order to model the mechanical behaviour of an austenitic-ferritic duplex stainless steel thanks to "composite" micromechanical non-linear models, its microstructure was analysed and the mechanical behaviour of each phase was characterised. The microstructural morphology of this steel was studied by selective dissolution of the austenitic phase. The microstructure consists of unconnected austenite islands dispersed in a ferritic matrix. Nano-indentation tests were carried out on each phase. These tests allowed to obtain the hardness and the Young modulus of each phase. A non-linear homogenization approach (secant and incremental formulations) was implemented and the results were compared to the monotonous macroscopic tensile tests carried out at constant strain rate. It allowed us to evaluate the relevance of the non-linear homogeneization models for the description of the elasto-plastic behaviour of the studied duplex stainless steel.

Flow Stress Equations for Type 304 Stainless and AISI 1055 Steels

1985 ◽  
Vol 107 (2) ◽  
pp. 97-100 ◽  
Author(s):  
P. Dadras
Keyword(s):  
Experimental Data ◽  
Stainless Steel ◽  
Flow Stress ◽  
Strain Rate ◽  
Working Conditions ◽  
Hot Working ◽  
304 Stainless Steel ◽  
Strain Behavior ◽  
Type 304 ◽  
Type 304 Stainless Steel

A model for stress-strain behavior under hot working conditions has been proposed. Based on experimental data, equations for the dependence of flow stress on strain, strain rate, and temperature have been developed. Application to type 304 stainless steel and AISI 1055 steel has been demonstrated.

A COMPARISON OF WEAR PROPERTIES OF WATER LUBRICATED NBR AND PTFE SLIDING BEARINGS

Tribologia ◽  
2019 ◽  
Vol 283 (1) ◽  
pp. 29-35
Author(s):  
Ewa PIĄTKOWSKA
Keyword(s):  
Stainless Steel ◽  
Working Conditions ◽  
Material Properties ◽  
Bending Moment ◽  
Wear Properties ◽  
Sliding Bearings ◽  
Specialized Equipment

The excessive wear of a journal shaft can be caused by many factors, for example, working conditions (e.g., temperaturę, slip speed, the type of lubricant), pressure, the type of material used on the bearings and shafts and their roughness, as well as contamination remaining in the system. This paper presents the roughness profiles co-operating with a rubber (NBR) and polytetrafluoroethylene (PTFE) bushes. The conditions of cooperation between the two materials tested in the sliding combination with the stainless steel journal were the same in each pair of bearings (PV); therefore, the comparison of their wear depends only on the material properties of the bush and the deformation of the journal shaft caused by the bending moment. To assess the size of the journal shaft, they were tested using a profilograph. In addition to the journal shaft, bearings were also evaluated, the wear level of which was noticed without the use of specialized equipment.

Study of Hot Formability of High Nitrogen Martensitic Stainless Steel

2008 ◽  
Vol 604-605 ◽  
pp. 279-284 ◽  
Author(s):  
Mohamad El Mehtedi
Keyword(s):  
Stainless Steel ◽  
Strain Rate ◽  
Working Conditions ◽  
Processing Map ◽  
Martensitic Stainless Steel ◽  
High Nitrogen ◽  
Flow Curves ◽  
Hot Torsion ◽  
Working Response ◽  
Safe Working

Alloying high-chromium steels with Nitrogen leads to increase in strength, fatigue life and corrosion resistance, but reduce ductility and could induce cracks formation during forging. In order to address these problems, the hot working response of a high Nitrogen martensitic stainless steel (Fe-16.2%Cr-1.1%Mo-0.33%N-0.34%C) has been investigated by means of hot torsion tests up to rupture, in the temperature and strain rate ranges of 900-1200°C and 0.005-5 s-1 respectively. The peak stresses of the flow curves were related to strain rate (e&) and temperature (T) by the well known sinh equation. The ductility and the safe working conditions were presented in terms of processing map. The microstructure of the steel in the quenched state after deformation was analyzed by means of optical microscopy; the differences in term of morphology and distribution of the various constituents were discussed.

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