Effect of Electrocontact Heating with Simultaneous Tension on the Residual Stresses in Stainless-Steel Pipes

Metallurgist ◽  
2015 ◽  
Vol 59 (7-8) ◽  
pp. 693-697 ◽  
Author(s):  
S. P. Burkin ◽  
G. V. Shimov ◽  
An. V. Serebryakov ◽  
Al. V. Serebryakov
Keyword(s):  
Stainless Steel ◽  
Residual Stresses ◽  
Steel Pipes ◽  
Electrocontact Heating

STUDY OF THE PHYSICOMECHANICAL PROPERTIES OF 08Kh18N10T STAINLESS STEEL PIPES EXPOSED TO ULTRASOUND UPON DRAWING

2019 ◽  
Vol 85 (5) ◽  
pp. 33-37
Author(s):  
S, M. Nebogov ◽  
S. A. Evsyukov ◽  
S. N. Svidunovich ◽  
Y. Y. Maltsev ◽  
A. A. Sobranin
Keyword(s):  
Mechanical Properties ◽  
Surface Roughness ◽  
Stainless Steel ◽  
Residual Stresses ◽  
Testing Machine ◽  
Physical And Mechanical Properties ◽  
Physicomechanical Properties ◽  
Ultra Sound ◽  
08Kh18n10t Steel ◽  
Steel Pipes

The drawing of pipes exposed to ultrasonic vibrations of radial type and their effect on the physical and mechanical properties of the pipe, as well as on the surface quality is studied. The ultrasonic unit with radial vibrations tested under production conditions is used to study the effect of ultrasound on the residual stresses present after drawing, surface roughness, as well as on the physical and mechanical properties and microdefects of 08Kh18N10T steel pipes. Defects and residual stresses before and after drawing under the effect of ultrasound were analyzed by the method of magnetic memory, using the stress concentration meter TSC-4M-16 with an eight-channel scanning device with four two-component sensors (Type 15). It is shown that the residual stresses decreased by more than two times under the effect of ultrasound. The surface roughness after drawing with ultrasound ranged within Ra = 0.087 - 0.092 µm. The physicomechanical properties were studied in tensile tests on an Instron tensile testing machine (SATEC Series). The yield stress qt was 551, the tensile strength qin — 672 MPa. It is shown that the effect of ultra-sound upon drawing pipes made of 08X18H10T stainless steel enhance their quality through reduction of the surface roughness and improved physicomechanical properties.

Measurement of Residual Stresses in a Type 316H Stainless Steel Offset Repair in a Pipe Girth Weld

2005 ◽  
Vol 128 (3) ◽  
pp. 420-426 ◽  
Author(s):  
S. Hossain ◽  
C. E. Truman ◽  
D. J. Smith ◽  
P. J. Bouchard
Keyword(s):  
Stainless Steel ◽  
Residual Stresses ◽  
Pipe Wall ◽  
Three Dimensional ◽  
Hole Drilling ◽  
Element Analysis ◽  
Steel Pipes ◽  
Stress Components ◽  
Dimensional Finite Element ◽  
Three Dimensional Finite Element

This paper presents measurements of the in-plane residual stress components through the wall of a 218mm long, 26mm deep repair weld, offset by 7mm from the centerline of a girth weld joining two type 316H stainless steel pipes approximately 37mm thick. The measurements were obtained using the deep hole drilling technique. Two locations were examined: (i) mid-length of the repair weld and (ii) the stop-end of the repair. Both measurements were taken along the girth weld centerline. The distributions and magnitudes of the measured longitudinal and transverse stress components at the two locations were very similar over the outer half of the pipe wall. Over the inner half of the pipe wall both components of stress were found to be significantly more compressive at the stop-end of the repair than at mid-length. In general, the transverse residual stresses were found to be lower than the longitudinal residual stresses at both locations. The measured stress profiles are compared with predicted residual stresses from a three-dimensional finite element analysis.

Residual Stress Simulation in Multi-Pass Weld of Stainless Steel Pipes

2012 ◽  
Vol 578 ◽  
pp. 82-86 ◽  
Author(s):  
Long Shi Gao
Keyword(s):  
Residual Stress ◽  
Stainless Steel ◽  
Residual Stresses ◽  
Mechanical Analysis ◽  
304 Stainless Steel ◽  
The Finite Element Method ◽  
Steel Pipes ◽  
Integrity Assessment ◽  
Temperature Distributions ◽  
Stress Simulation

Multi-pass welds are used in pipes with stainless steel. The complicated temperature field and residual stresses in these welded structures are very important. The finite element method is used to simulate residual stress in multi-pass butt-welds in this paper. Element birth technique is implemented to model multi-pass welded 304 Stainless Steel Pipes. One-way coupled Thermo-mechanical analysis is adopted to calculate the residual stresses, that the structural analysis takes the temperature distributions as thermal input. The results provide reference for the structure integrity assessment of welded pipes.

Residual Stress Generation and Relaxation in Butt-Welded Pipes

1982 ◽  
Vol 104 (3) ◽  
pp. 188-192 ◽  
Author(s):  
S. Nair ◽  
E. Pang ◽  
R. C. Dix
Keyword(s):  
Heat Treatment ◽  
Residual Stress ◽  
Stainless Steel ◽  
Residual Stresses ◽  
Numerical Scheme ◽  
Stress Generation ◽  
304 Stainless Steel ◽  
Thermally Induced ◽  
Steel Pipes

A numerical scheme for the determination of thermally induced local residual stresses and their relaxation behavior during heat treatment in the case of butt-welded pipes is described. The procedure is illustrated by considering 304 stainless steel and SAE 1020 steel pipes. The results are compared with available experimental and numerical results.

Residual Stress Generation and Relaxation in Butt-Welded Pipes

1982 ◽  
Vol 104 (1) ◽  
pp. 42-46 ◽  
Author(s):  
S. Nair ◽  
E. Pang ◽  
R. C. Dix
Keyword(s):  
Heat Treatment ◽  
Residual Stress ◽  
Stainless Steel ◽  
Residual Stresses ◽  
Numerical Scheme ◽  
Stress Generation ◽  
304 Stainless Steel ◽  
Thermally Induced ◽  
Steel Pipes

A numerical scheme for the determination of thermally induced local residual stresses and their relaxation behavior during heat treatment in the case of butt-welded pipes is described. The procedure is illustrated by considering 304 stainless steel and SAE 1020 steel pipes. The results are compared with available experimental and numerical results.

The Effect of Pipe Thickness on Residual Stresses due to Girth Welds

1982 ◽  
Vol 104 (3) ◽  
pp. 204-209 ◽  
Author(s):  
E. F. Rybicki ◽  
P. A. McGuire ◽  
E. Merrick ◽  
J. Wert
Keyword(s):  
Residual Stress ◽  
Stainless Steel ◽  
Residual Stresses ◽  
304 Stainless Steel ◽  
Stress Distributions ◽  
Intergranular Stress Corrosion ◽  
Steel Pipes ◽  
Inner Surface ◽  
Girth Welds ◽  
Intergranular Stress Corrosion Cracking

This paper addresses the question of what effect the pipe thickness has on weld residual stresses in 304 stainless steel piping. Two diameters are considered. These are nominal 4-in. and 10-in. diameters. Four pipe wall thicknesses corresponding to schedules 10, 40, 80, and 160 are examined for each pipe. The focus is on residual stress distributions on the pipe inner surface because this is a primary site for intergranular stress corrosion cracking in 304 stainless steel pipes. The trends in residual stress values are toward more compressive stresses at the pipe inner surface for thicker pipes with the same nominal diameter. Residual axial stresses for the thick 10-in. schedule 160 pipe were found to be compressive while those for the thinner schedule 80 pipe were tensile. X-ray residual stress data for a 6-in-dia schedule 160 pipe fall between the results for the 4-in. and 10-in. schedule 160 pipes and support the findings of the study.

Measurement of Residual Stresses in a Type 316H Stainless Steel Offset Repair in a Pipe Girth Weld

2004 ◽  
Author(s):  
S. Hossain ◽  
C. E. Truman ◽  
D. J. Smith ◽  
P. J. Bouchard
Keyword(s):  
Stainless Steel ◽  
Residual Stresses ◽  
Pipe Wall ◽  
Three Dimensional ◽  
Hole Drilling ◽  
Element Analysis ◽  
Steel Pipes ◽  
Stress Components ◽  
Dimensional Finite Element ◽  
Three Dimensional Finite Element

This paper presents measurements of the in-plane residual stress components through the wall of a 218mm long, 26mm deep repair weld, offset by 7mm from the centreline of a girth weld joining two type 316H stainless steel pipes approximately 37mm thick. The measurements were obtained using the deep hole drilling technique. Two locations were examined: (i) mid-length of the repair weld and (ii) the stop-end of the repair. Both measurements were taken along the girth weld centreline. The distributions and magnitudes of the measured longitudinal and transverse stress components at the two locations were very similar over the outer half of the pipe wall. Over the inner half of the pipe wall both components of stress were found to be significantly more compressive at the stop-end of the repair than at mid-length. In general, the transverse residual stresses were found to be lower than the longitudinal residual stresses at both locations. The measured stress profiles are compared with predicted residual stresses from a three dimensional finite element analysis for a similar weld repair.

Experimental and Numerical Investigation into Residual Stress During Turning Operation for Stainless Steel AISI 316

2020 ◽  
Vol 38 (12A) ◽  
pp. 1862-1870
Author(s):  
Safa M. Lafta ◽  
Maan A. Tawfiq
Keyword(s):  
Stainless Steel ◽  
Residual Stresses ◽  
Orthogonal Cutting ◽  
Cutting Tools ◽  
Cutting Speed ◽  
Percentage Error ◽  
Depth Of Cut ◽  
Main Role ◽  
Turning Operation ◽  
Aisi 316

RS (residual stresses) represent the main role in the performance of structures and machined parts. The main objective of this paper is to investigate the effect of feed rate with constant cutting speed and depth of cut on residual stresses in orthogonal cutting, using Tungsten carbide cutting tools when machining AISI 316 in turning operation. AISI 316 stainless steel was selected in experiments since it is used in many important industries such as chemical, petrochemical industries, power generation, electrical engineering, food and beverage industry. Four feed rates were selected (0.228, 0.16, 0.08 and 0.065) mm/rev when cutting speed is constant 71 mm/min and depth of cutting 2 mm. The experimental results of residual stresses were (-15.75, 12.84, 64.9, 37.74) MPa and the numerical results of residual stresses were (-15, 12, 59, and 37) MPa. The best value of residual stresses is (-15.75 and -15) MPa when it is in a compressive way. The results showed that the percentage error between numerical by using (ABAQUS/ CAE ver. 2017) and experimental work measured by X-ray diffraction is range (2-15) %.

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