scholarly journals Residual Stress Evaluation of Butt Weld Sample of High Tensile Strength Steel Using Neutron Diffraction

2005 ◽  
Vol 54 (7) ◽  
pp. 685-691 ◽  
Author(s):  
Hiroshi SUZUKI ◽  
Thomas M. HOLDEN ◽  
Atsushi MORIAI ◽  
Nobuaki MINAKAWA ◽  
Yukio MORII
Keyword(s):  
Residual Stress ◽  
Tensile Strength ◽  
Neutron Diffraction ◽  
High Tensile Strength ◽  
Butt Weld ◽  
Stress Evaluation

Residual Stress Evaluation of Ni Based Weld Metal Using Neutron Diffraction Method

2006 ◽  
Vol 524-525 ◽  
pp. 697-702 ◽  
Author(s):  
Shinobu Okido ◽  
Hiroshi Suzuki ◽  
K. Saito
Keyword(s):  
Residual Stress ◽  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Neutron Diffraction ◽  
Weld Metal ◽  
Diffraction Method ◽  
Fem Analysis ◽  
Butt Weld ◽  
Stress Evaluation ◽  
Neutron Diffraction Method

Residual stress generated in Type-316 austenitic stainless steel butt-weld jointed by Inconel-182 was measured using a neutron diffraction method and compared with values calculated using FEM analysis. The measured values of Type-316 austenitic stainless steel as base material agreed well with the calculated ones. The diffraction had high intensity and a sharp profile in the base metal. However, it was difficult to measure the residual stress at the weld metal due to very weak diffraction intensities. This phenomenon was caused by the texture in the weld material generated during the weld procedure. As a result, this texture induced an inaccurate evaluation of the residual stress. Procedures for residual stress evaluation to solve this textured material problem are discussed in this paper. As a method for stress evaluation, the measured strains obtained from a different diffraction plane with strong intensity were modified with the ratio of the individual elastic constant. The values of residual stress obtained using this method were almost the same as those of the standard method using Hooke’s law. Also, these residual stress values agreed roughly with those from the FEM analysis. This evaluation method is effective for measured samples with a strong texture like Ni-based weld metal.

The Residual Stress Behavior in Fatigue Process of 80kg/mm2 High Tensile Strength Steels

1967 ◽  
Vol 16 (171) ◽  
pp. 926-930
Author(s):  
Fumiaki KANZAKI ◽  
Nozomu NAWATA ◽  
Hajime KITAGAWA
Keyword(s):  
Residual Stress ◽  
Tensile Strength ◽  
High Tensile Strength ◽  
Fatigue Process ◽  
Stress Behavior

Residual Stress Evaluation In Austenitic Stainless Steel Butt Weld Joints By Ultrasonic Technique

1992 ◽  
Vol 25 (3) ◽  
pp. 130 ◽  
Author(s):  
P. Palanichamy ◽  
A. Joseph ◽  
K. V. Kasiviswanathan ◽  
D. K. Bhattacharya ◽  
Baldev Raj
Keyword(s):  
Residual Stress ◽  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Ultrasonic Technique ◽  
Butt Weld ◽  
Stress Evaluation ◽  
Weld Joints

Thermal stress history in high-tensile strength steels during weld process

2004 ◽  
Vol 120 ◽  
pp. 635-648
Author(s):  
M. Mochizuki ◽  
M. Toyoda
Keyword(s):  
Residual Stress ◽  
Tensile Strength ◽  
Phase Transformation ◽  
Thermal Stress ◽  
Stress Generation ◽  
Experimental Result ◽  
High Tensile Strength ◽  
Stress History ◽  
Fundamental Study ◽  
History Of

Thermal and residual stresses in High-Tensile Strength Steels during weld process are numerically simulated considering phase transformation effect. Fundamental study for the history of thermal stress due to phase transformation and residual stress during welding heat cycles is studied in order to investigate the generating mechanism of residual stress and the effects of material properties on stress generation. Two materials of high-tensile strength steels are used in the numerical simulation and experiment. Material property of each microstructural phase is used and the time- and temperature-dependant proportion of microstructure are considered by using CCT-diagram in the analysis. Thermal stress history obtained by the simulation agrees well with the experimental result during welding heat cycles. Some applications to repair welds and fillet-weld joints of the analytical method are then introduced.

scholarly journals High stereographic resolution texture and residual stress evaluation using time-of-flight neutron diffraction

2018 ◽  
Vol 51 (3) ◽  
pp. 746-760 ◽  
Author(s):  
Pingguang Xu ◽  
Stefanus Harjo ◽  
Mayumi Ojima ◽  
Hiroshi Suzuki ◽  
Takayoshi Ito ◽  
...  
Keyword(s):  
Residual Stress ◽  
Neutron Diffraction ◽  
Geometric Mean ◽  
Rolling Direction ◽  
Rietveld Analysis ◽  
Proton Accelerator ◽  
Science Center ◽  
Texture Measurement ◽  
Linear Contraction ◽  
Stress Evaluation

Neutron diffraction texture measurements provide bulk averaged textures with excellent grain orientation statistics, even for large-grained materials, owing to the probed volume being of the order of 1 cm3. Furthermore, crystallographic parameters and other valuable microstructure information such as phase fraction, coherent crystallite size, root-mean-square microstrain, macroscopic or intergranular strain and stress, etc. can be derived from neutron diffractograms. A procedure for combined high stereographic resolution texture and residual stress evaluation was established on the pulsed-neutron-source-based engineering materials diffractometer TAKUMI at the Materials and Life Science Experimental Facility of the Japan Proton Accelerator Research Center, through division of the neutron detector panel regions. Pole figure evaluation of a limestone standard sample with a well known texture suggested that the precision obtained for texture measurement is comparable to that of the established neutron beamlines utilized for texture measurement, such as the HIPPO diffractometer at the Los Alamos Neutron Science Center (New Mexico, USA) and the D20 angle-dispersive neutron diffractometer at the Institut Laue–Langevin (Grenoble, France). A high-strength martensite–austenite multilayered steel was employed for further verification of the reliability of simultaneous Rietveld analysis of multiphase textures and macro stress tensors. By using a texture-weighted geometric mean micromechanical (BulkPathGEO) model, a macro stress tensor analysis with a plane stress assumption showed a rolling direction–transverse direction (RD–TD) in-plane compressive stress (about −330 MPa) in the martensite layers and an RD–TD in-plane tensile stress (about 320 MPa) in the austenite layers. The phase stress partitioning was ascribed mainly to the additive effect of the volume expansion during martensite transformation and the linear contraction misfit between austenite layers and newly transformed martensite layers during the water quenching process.

S0304-1-1 Residual Stress Evaluation of Cold-Bent Pipe by Neutron Diffraction Method

2009 ◽  
Vol 2009.1 (0) ◽  
pp. 207-208
Author(s):  
Akira MAEKAWA ◽  
Michiyasu NODA ◽  
Toru OUMAYA ◽  
Shigeru TAKAHASHI
Keyword(s):  
Residual Stress ◽  
Neutron Diffraction ◽  
Diffraction Method ◽  
Stress Evaluation ◽  
Bent Pipe ◽  
Neutron Diffraction Method

530 Residual Stress Evaluation of Laser-Peened Tubing by Neutron Diffraction

2006 ◽  
Vol 2006 (0) ◽  
pp. 317-318
Author(s):  
Yuji SANO ◽  
Minoru OBATA ◽  
Hideki NAITO ◽  
Koichi AKITA ◽  
Hiroshi SUZUKI
Keyword(s):  
Residual Stress ◽  
Neutron Diffraction ◽  
Stress Evaluation
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