scholarly journals Остаточные напряжения в несущей ленте AISI 310S на этапе нанесения буферного слоя YSZ при изготовлении ВТСП-2 провода

2021 ◽  
Vol 91 (12) ◽  
pp. 1964
Author(s):  
А.В. Иродова ◽  
И.Д. Карпов ◽  
В.С. Круглов ◽  
В.Е. Крылов ◽  
С.В. Шавкин ◽  
...  
Keyword(s):  
Residual Stress ◽  
Stainless Steel ◽  
Neutron Diffraction ◽  
Tensile Stress ◽  
Buffer Layer ◽  
Compressive Stress ◽  
Rolling Plane ◽  
Mechanical Polishing ◽  
Steel Aisi ◽  
Stainless Steel Aisi

Using neutron diffraction we determined internal residual stress in the stainless steel AISI 310S carrier tape with a thickness of 100 μm and a width of 4 mm after mechanical polishing and the ABAD deposition of the textured YSZ buffer layer. It is shown that mechanical polishing causes a slight distension of the tape in the rolling plane. After the deposition of the YSZ layer, uniform tensile stress of 70 MPa isotropic in the rolling plane was observed inside the tape. Calculations have shown that it results from relaxation of compressive stress acting on the surface of the tape in a layer several times thicker than the YSZ layer. It is assumed that the surface of the tape is plastically deformed during the YSZ deposition.

Residual Stress Analysis in Deep Rolling Process on Gas Tungsten Arc Weld of Stainless Steel AISI 316L

2021 ◽  
Vol 880 ◽  
pp. 23-28
Author(s):  
Warinthorn Thanakulwattana ◽  
Wasawat Nakkiew
Keyword(s):  
Residual Stress ◽  
Stainless Steel ◽  
Surface Layer ◽  
Compressive Residual Stress ◽  
Aisi 316L ◽  
Deep Rolling ◽  
Gas Tungsten Arc ◽  
Steel Aisi ◽  
Gas Tungsten ◽  
Stainless Steel Aisi

Because of the general problem of the welding workpiece such as fatigue fracture caused by tensile residual stress lead to initial and propagation crack in the fusion zone. Thus, the mechanical surface treatment of deep rolling on Gas Tungsten Arc Welded (GTAW) surfaces of AISI 316L was studied. Deep rolling (DR) is a cold working process to induce compressive residual stress in the surface layer of the workpiece resulting in hardening deformation which increased surface hardness, and smooth surface that inhibit crack growth and improve fracture strength of materials. The present study focuses on compressive residual stress at the surface of stainless steel AISI 316L butt welded joint of GTAW. The three parameters of DR process were used; pressure 150 bar, rolling speed 400 mm/min, and step over 1.0 mm. The residual stresses analysis by X-ray diffraction with sin2Ψ method at 0, 5, 10, and 20 mm from the center of the welded bead. The results showed that the DR process on the welded of GTAW induce the minimum compressive residual stress-408.6 MPa and maximum-498.1 MPa in longitudinal direction. The results of transverse residual stress in minimum and maximum are 43.7 MPa and-34.8 MPa respectively. The FWHM of DR both longitudinal and transverse direction were increased in the same trend. Furthermore, the microhardness after DR treatment on workpiece surface layer higher than GTAW average 0.4 times.

scholarly journals Measured Biaxial Residual Stress Maps in a Stainless Steel Weld

2015 ◽  
Vol 1 (4) ◽  
Author(s):  
Mitchell D. Olson ◽  
Michael R. Hill ◽  
Vipul I. Patel ◽  
Ondrej Muránsky ◽  
Thomas Sisneros
Keyword(s):  
Residual Stress ◽  
Stainless Steel ◽  
Tensile Stress ◽  
Compressive Stress ◽  
Biaxial Stress ◽  
Contour Method ◽  
Steel Weld ◽  
Stainless Steel 316L ◽  
Stress Measurements ◽  
Stainless Steel Weld

This paper describes a sequence of residual stress measurements made to determine a two-dimensional map of biaxial residual stress in a stainless steel weld. A long stainless steel (316L) plate with an eight-pass groove weld (308L filler) was used. The biaxial stress measurements follow a recently developed approach, comprising a combination of contour method and slitting measurements, with a computation to determine the effects of out-of-plane stress on a thin slice. The measured longitudinal stress is highly tensile in the weld- and heat-affected zone, with a maximum around 450 MPa, and compressive stress toward the transverse edges around −250 MPa. The total transverse stress has a banded profile in the weld with highly tensile stress at the bottom of the plate (y = 0) of 400 MPa, rapidly changing to compressive stress (at y = 5 mm) of −200 MPa, then tensile stress at the weld root (y = 17 mm) and in the weld around 200 MPa, followed by compressive stress at the top of the weld at around −150 MPa. The results of the biaxial map compare well with the results of neutron diffraction measurements and output from a computational weld simulation.

Residual stress in nano-structured stainless steel (AISI 316L) prompted by Xe+ ion bombardment at different impinging angles

2016 ◽  
Vol 120 (14) ◽  
pp. 145306 ◽  
Author(s):  
S. Cucatti ◽  
R. Droppa ◽  
C. A. Figueroa ◽  
M. Klaus ◽  
Ch. Genzel ◽  
...  
Keyword(s):  
Residual Stress ◽  
Stainless Steel ◽  
Ion Bombardment ◽  
Aisi 316L ◽  
Steel Aisi ◽  
Stainless Steel Aisi

scholarly journals Исследование внутренних напряжений в несущей ленте-подложке из нержавеющей стали AISI 310S для ВТСП проводов второго поколения методом нейтронной стресс-дифрактометрии

2020 ◽  
Vol 90 (7) ◽  
pp. 1095
Author(s):  
И.Д. Карпов ◽  
А.В. Иродова ◽  
В.С. Круглов ◽  
С.В. Шавкин ◽  
В.Т. Эм
Keyword(s):  
Stainless Steel ◽  
Residual Stresses ◽  
Rolling Direction ◽  
Rolling Plane ◽  
The Other ◽  
Steel Aisi ◽  
Stainless Steel Aisi

The method of neutron stress diffractometry has been used to study a distribution of residual stresses in the stainless steel AISI 310S ribbon, of 100 μm thick and 4 mm wide, in three directions – along, across and perpendicular to rolling plane. The residual macro stresses averaged over the ribbon length of 40 cm are determined. The longitudinal, transverse and normal macro stresses are respectively –71±21 MPa, –31±16 MPa, and –11±16 MPa on one edge of the ribbon and +30±19 MPa, +64±16 MPa, and +30±16 MPa on the other edge. Such distribution of macro stresses compressing the ribbon on one edge and stretching it on the other edge is inherent for so-called crescent-shaped deformation of the ribbon – its bending in rolling plane along rolling direction. A correlation between the macro stresses magnitude and the micro stresses presence has been observed – the stronger macro stresses the higher concentration of micro stresses.

scholarly journals Effect of post-fabrication treatments on surface residual stresses of additive manufactured stainless steel 316L

2021 ◽  
Vol 49 (1) ◽  
pp. 87-94
Author(s):  
Kumar Barath ◽  
K.M. Aravindan ◽  
Jebaraj Vinoth ◽  
Kumar Sampath
Keyword(s):  
Residual Stress ◽  
Stainless Steel ◽  
Residual Stresses ◽  
Homogeneous Distribution ◽  
Stainless Steel 316L ◽  
Compressive Stresses ◽  
Surface Residual Stresses ◽  
Laser Heat Source ◽  
Steel Aisi ◽  
Stainless Steel Aisi

In this work, an investigation was made to analyze the surface residual stresses on additive manufactured stainless steel AISI 316L in as-built and post-treated conditions. Direct metal laser sintering was used to fabricate the metal blocks. X-ray residual stress analysis on the as-fabricated surface revealed the presence of an inhomogeneous and irregular distribution of residual stresses in the as-built condition ranging from - 30 MPa to 111 MPa. It was mainly due to the localized laser heat source that caused variations in stresses at a lattice level. Heat treatment was performed for providing relief to the residual stress from the as-built condition showed significant relief of residual stress, which was lesser than 50% compared to as-built condition. Beneficial compressive residual stress induced by shot peening and lapping resulted in high magnitude compressive stresses on the surface. Also, homogeneous distribution of residual stress was found on the peened and lapped surface layer with an average of - 531 MPa and - 554 MPa, respectively.

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