scholarly journals Experiments on Obtaining Silicified Welded Joints Using Mechanical Vibrations

2020 ◽  
Vol 21 (3) ◽  
pp. 125-129
Author(s):  
Novac Bogdan
Keyword(s):  
Welded Joints ◽  
Mechanical Vibrations

Residual stress relief of welded joints by mechanical vibrations

2016 ◽  
Vol 38 (8) ◽  
pp. 2449-2457 ◽  
Author(s):  
Tatiane C. Chuvas ◽  
Daniel A. Castello ◽  
Maria P. Cindra Fonseca
Keyword(s):  
Residual Stress ◽  
Welded Joints ◽  
Stress Relief ◽  
Mechanical Vibrations

Flexural Strength Improvement of Welded Joints Prepared by Vibratory Welding Process

2015 ◽  
Vol 5 (4) ◽  
pp. 1-16
Author(s):  
P. Govinda Rao ◽  
P. Srinivasa Rao ◽  
A. Gopala Krishna
Keyword(s):  
Mechanical Properties ◽  
Flexural Strength ◽  
Weld Pool ◽  
Heat Affected Zone ◽  
Welded Joints ◽  
Welding Process ◽  
Mechanical Vibrations ◽  
Refined Microstructure ◽  
Strength Improvement

Vibration techniques have been used in welding for improving the mechanical properties of metals in the last few decades. In the present work, vibratory setup has been used for inducing mechanical vibrations into the weld pool during welding. The designed vibratory setup produces the required frequency with the amplitude and acceleration in terms of voltages. An increase in the flexural strength of the weld pieces in to the heat affected zone (HAZ) has been observed. The increase in mechanical properties is attributed to, as the weld pool solidifies, grains are not only limited in size but also dendrites are broken before they grow large in size. Refined microstructure has been observed. The above mechanism is responsible for the improvement in flexural strength of weld pieces welded with vibratory setup compared to without vibration during welding.

scholarly journals Installation for Producing Mechanical Vibrations used in the Finishing of the Welded Joints Structure

2020 ◽  
Vol 22 (1) ◽  
pp. 79-84
Author(s):  
Bogdan Novac
Keyword(s):  
Magnetic Properties ◽  
Welded Joints ◽  
Mechanical Vibration ◽  
Vibration System ◽  
Mechanical Vibrations ◽  
Speed Measurement ◽  
Stress Relieving ◽  
Constructive Version ◽  
Vibration Wave ◽  
Speed Adjustment

Abstract The paper presents a constructive version of a mechanical vibration generator designed to be used at stress relieving of welded joints. This installation can be used on all brands of steels and welded joints, whether they have magnetic properties or not. In the generator construction a DC motor was used, in order to be able to adjust the speed more easily. The speed adjustment is made with a potentiometer, and the speed measurement is made with a tachometer. The tachometer measures the speeds based on the pulses given by a four-pointed cam rotating between the plates of a capacitor. The vibration system also contains a piezoelectric accelerograph, which is attached to the welded part subjected to vibration, in order to measure the level of vibration and the parameters of the vibration wave.

TREATMENT OF WELDED JOINTS BY A PULSE ELECTROMAGNETIC FIELD WITH SMALL SKIN-EFFECT

2018 ◽  
Vol 2018 (50) ◽  
pp. 106-114
Author(s):  
Yu. Vasetskiy ◽  
◽  
I. Kondratenko ◽  
I. Mazurenko ◽  
М. Pashchyn ◽  
...  
Keyword(s):  
Electromagnetic Field ◽  
Welded Joints ◽  
Skin Effect ◽  
Pulse Electromagnetic Field
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