A Method of Welding Residual Stress Reduction using Ultrasonic Vibration

2021 ◽  
Vol 2021.27 (0) ◽  
pp. 10B09
Author(s):  
Takero HIROSE ◽  
Katsumi KURITA ◽  
Shigeru AOKI ◽  
Shigeomi KOSHIMIZU
Keyword(s):  
Residual Stress ◽  
Ultrasonic Vibration ◽  
Stress Reduction ◽  
Welding Residual Stress

Effectiveness of Welding Residual Stress Reduction Method using Ultrasonic Vibration in Stainless Steel

2021 ◽  
Vol 2021.27 (0) ◽  
pp. 10B08
Author(s):  
Akira NAKAZATO ◽  
Katsumi KURITA ◽  
Shigeru AOKI ◽  
Shigeomi KOSHIMIZU ◽  
Tsuyoshi MATSUYAMA
Keyword(s):  
Residual Stress ◽  
Stainless Steel ◽  
Ultrasonic Vibration ◽  
Stress Reduction ◽  
Reduction Method ◽  
Welding Residual Stress

scholarly journals Evaluation of Welding Residual Stress Reduction by Ultrasonic Vibration Load

2021 ◽  
Author(s):  
Akira Nakazato ◽  
Katsumi Kurita ◽  
Shigeru Aoki ◽  
Shigeomi Koshimizu ◽  
Tsuyoshi Matuyama
Keyword(s):  
Residual Stress ◽  
Ultrasonic Vibration ◽  
Stress Reduction ◽  
Welding Residual Stress ◽  
Vibration Load

1002 Reduction of welding residual stress using ultrasonic vibration : Influence of response acceleration amplitude

2016 ◽  
Vol 2016.53 (0) ◽  
pp. _1002-1_-_1002-5_
Author(s):  
Shota MUTOH ◽  
Shigeru AOKI ◽  
Katsumi KURITA ◽  
Shigeomi KOSHIMIZU ◽  
Akira MAEKAWA
Keyword(s):  
Residual Stress ◽  
Ultrasonic Vibration ◽  
Welding Residual Stress ◽  
Acceleration Amplitude

Welding residual stress reduction by scanning of a defocused beam

2012 ◽  
Vol 212 (1) ◽  
pp. 19-26 ◽  
Author(s):  
F. Tölle ◽  
A. Gumenyuk ◽  
A. Backhaus ◽  
S. Olschok ◽  
M. Rethmeier ◽  
...  
Keyword(s):  
Residual Stress ◽  
Stress Reduction ◽  
Welding Residual Stress

scholarly journals Optimization Study of Post-Weld Heat Treatment for 12Cr1MoV Pipe Welded Joint

Metals ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 127
Author(s):  
Zichen Liu ◽  
Xiaodong Hu ◽  
Zhiwei Yang ◽  
Bin Yang ◽  
Jingkai Chen ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Residual Stress ◽  
Stress Reduction ◽  
Simulation Method ◽  
Post Weld Heat Treatment ◽  
Residual Stress Field ◽  
Element Analysis ◽  
Tempering Treatment ◽  
Temper Heat Treatment ◽  
Weld Heat

In order to clarify the role of different post-weld heat treatment processes in the manufacturing process, welding tests, post-weld heat treatment tests, and finite element analysis (FEA) are carried out for 12C1MoV steel pipes. The simulated temperature field and residual stress field agree well with the measured results, which indicates that the simulation method is available. The influence of post-weld heat treatment process parameters on residual stress reduction results is further analyzed. It is found that the post weld dehydrogenation treatment could not release residual stress obviously. However, the residual stress can be relieved by 65% with tempering treatment. The stress relief effect of “post weld dehydrogenation treatment + temper heat treatment” is same with that of “temper heat treatment”. The higher the temperature, the greater the residual stress reduction, when the peak temperature is at 650–750 °C, especially for the stress concentration area. The longer holding time has no obvious positive effect on the reduction of residual stress.

Dynamic Response Analysis of Butt Joint of HTS-A Steel Considering Welding Residual Stresses

2013 ◽  
Vol 423-426 ◽  
pp. 944-950
Author(s):  
Wei Shen ◽  
Ren Jun Yan ◽  
Lin Xu ◽  
Kai Qin ◽  
Xin Yu Zhang ◽  
...  
Keyword(s):  
Residual Stress ◽  
Dynamic Response ◽  
Hot Spot ◽  
Time History ◽  
High Strength ◽  
Simulation Method ◽  
Butt Joint ◽  
Welding Residual Stress ◽  
Response Analysis ◽  
Hull Structure

This paper uses both numerical simulation method and experimental research method to study on welding residual stress of high-strength steel of the cone-cylinder hull. Welding is often accompanied by a larger welding residual stress, which directly affects the safety and service life of the hull structure. In order to obtain the distribution of the welding residual stress, the welding procedure was developed by its parameter language by using FE analysis software in this paper. Then the welding residual stress of hot spot region was measured through X-ray nondestructive testing method, and compared it with simulation results. Finally, considering the residual stress as the initial stress, this paper analyzed dynamic response process of the welding structure under combined actions of the welding residual stress and multiaxial loads, which could more accurately determine the stress of welding structure and the location of fatigue risk point. According to the amplitude of damage parameters and strain time-history curve, we can estimate the fatigue life of structure by selecting the corresponding damage models.

In Situ Thin Film Stress Measurements – A Path to Understanding the Structure and Morphology of Electron Beam Evaporated ZnS

2002 ◽  
Vol 749 ◽  
Author(s):  
Vincent Barrioz ◽  
Stuart J. C. Irvine ◽  
D. Paul
Keyword(s):  
Residual Stress ◽  
Surface Roughness ◽  
Electron Beam ◽  
Stress Reduction ◽  
Float Glass ◽  
Film Stress ◽  
Intrinsic Stress ◽  
Ex Situ ◽  
Stress Measurements

ABSTRACTZnS is a material of choice in the optical coating industry for its optical properties and broad transparency range. One of the drawbacks of ZnS is that it develops high compressive intrinsic stress resulting in large residual stress in the deposited layer. This paper concentrates on the evolution of residual stress reduction in ZnS single layers, depending upon their deposition rate or the substrate temperature during deposition (i.e. 22 °C and 133 °C). The substrate preparation is addressed for consideration of layer adhesion. Residual stress of up to − 550 MPa has been observed in amorphous/poor polycrystalline ZnS layers, deposited on CMX and Float glass type substrates, by electron beam evaporation at 22 °C, with a surface roughness between 0.4 and 0.8 nm. At 133 °C, the layer had a surface roughness of 1 nm, the residual stress in the layer decreased to − 150 MPa, developing a wurtzite structure with a (002) preferred orientation. In situ stress measurements, using a novel optical approach with a laser-fibre system, were carried out to identify the various sources of stress. A description of this novel in situ stress monitor and its advantages are outlined. The residual stress values were supported by two ex situ stress techniques. The surface morphology analysis of the ZnS layers was carried out using an atomic force microscope (AFM), and showed that stress reduced layers actually gave rougher surfaces.

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