EFFECT OF WELD HEAT INPUT ON THE MECHANICAL CHARACTERISTICS OF Cr-Mo STEEL BARS USING THE MIG WELDING PROCEDURE

The impact of weld heat input on the mechanical characteristics of this steel was investigated in this study. The weld sample was an ASTM A304 grade A Flat Bar with a thickness of 5.00 millimetres. With the use of a data logger, a K-type thermocouple was installed in the drilled holes to measure the...

Full description

Bibliographic Details
Main Authors: Reuben Adebare ADEWUYI, Oluwasayo Dorcas OLAKOLEGAN, Emanuel Abiodun AKEJU
Format: Article
Language:English
Published: Politehnium Publishing House 2022-03-01
Series:European Journal of Materials Science and Engineering
Subjects:
Online Access:https://ejmse.ro/articles/07_01_01_EJMSE-21-148.pdf
_version_ 1830231648738738176
author Reuben Adebare ADEWUYI
Oluwasayo Dorcas OLAKOLEGAN
Emanuel Abiodun AKEJU
author_facet Reuben Adebare ADEWUYI
Oluwasayo Dorcas OLAKOLEGAN
Emanuel Abiodun AKEJU
author_sort Reuben Adebare ADEWUYI
collection DOAJ
description The impact of weld heat input on the mechanical characteristics of this steel was investigated in this study. The weld sample was an ASTM A304 grade A Flat Bar with a thickness of 5.00 millimetres. With the use of a data logger, a K-type thermocouple was installed in the drilled holes to measure the temperature fields at each of the places throughout the welding operation. The welding sample was created by varying three process parameters in the MIG welding process. Welding current, weld passes, and point of interest thermocouple position away from the weld centreline are the parameters. The experiment was designed using Taguchi's L9 orthogonal array to limit the number of experimental runs (DOE). To study the influence of weld heat input, the samples were subjected to mechanical and microstructure testing. The hardness test revealed that when the weld pass on the weld zone, HAZ, and base metal increases, the hardness value falls. The tensile test finding indicated that the tensile strength of samples 80A and 100A rises as the weld pass increases, however sample 60A decreases as the weld pass increases. The impact resistance increased when the weld pass was increased, according to the findings of the impact tests. The distance away from the weld centreline of the region subjected to a certain peak temperature increases as weld heat input increases, according to the weld thermal cycle. The value of the temperature fields increases dramatically as the heat source passes through the specific cross-section, where thermocouples are positioned. Later on, the temperature begins to drop at a slower rate. It's also obvious that when the distance between the measurement point and the weld centreline grows, the temperature drops.
first_indexed 2024-12-18T11:18:43Z
format Article
id doaj.art-34a47997c99e46bbb481fb445cdc302c
institution Directory Open Access Journal
issn 2537-4338
2537-4346
language English
last_indexed 2024-12-18T11:18:43Z
publishDate 2022-03-01
publisher Politehnium Publishing House
record_format Article
series European Journal of Materials Science and Engineering
spelling doaj.art-34a47997c99e46bbb481fb445cdc302c2022-12-21T21:09:52ZengPolitehnium Publishing HouseEuropean Journal of Materials Science and Engineering2537-43382537-43462022-03-017131410.36868/ejmse.2022.07.01.003EFFECT OF WELD HEAT INPUT ON THE MECHANICAL CHARACTERISTICS OF Cr-Mo STEEL BARS USING THE MIG WELDING PROCEDUREReuben Adebare ADEWUYI0Oluwasayo Dorcas OLAKOLEGAN1Emanuel Abiodun AKEJU2Department of Mechanical Engineering, The Federal Polytechnic, Ado-Ekiti, NigeriaDepartment of Mechanical Engineering, The Federal Polytechnic, Ado-Ekiti, NigeriaDepartment of Mechanical Engineering, The Federal Polytechnic, Ado-Ekiti, NigeriaThe impact of weld heat input on the mechanical characteristics of this steel was investigated in this study. The weld sample was an ASTM A304 grade A Flat Bar with a thickness of 5.00 millimetres. With the use of a data logger, a K-type thermocouple was installed in the drilled holes to measure the temperature fields at each of the places throughout the welding operation. The welding sample was created by varying three process parameters in the MIG welding process. Welding current, weld passes, and point of interest thermocouple position away from the weld centreline are the parameters. The experiment was designed using Taguchi's L9 orthogonal array to limit the number of experimental runs (DOE). To study the influence of weld heat input, the samples were subjected to mechanical and microstructure testing. The hardness test revealed that when the weld pass on the weld zone, HAZ, and base metal increases, the hardness value falls. The tensile test finding indicated that the tensile strength of samples 80A and 100A rises as the weld pass increases, however sample 60A decreases as the weld pass increases. The impact resistance increased when the weld pass was increased, according to the findings of the impact tests. The distance away from the weld centreline of the region subjected to a certain peak temperature increases as weld heat input increases, according to the weld thermal cycle. The value of the temperature fields increases dramatically as the heat source passes through the specific cross-section, where thermocouples are positioned. Later on, the temperature begins to drop at a slower rate. It's also obvious that when the distance between the measurement point and the weld centreline grows, the temperature drops.https://ejmse.ro/articles/07_01_01_EJMSE-21-148.pdfweldmentweld thermal cyclemechanical propertiesmicrostructure
spellingShingle Reuben Adebare ADEWUYI
Oluwasayo Dorcas OLAKOLEGAN
Emanuel Abiodun AKEJU
EFFECT OF WELD HEAT INPUT ON THE MECHANICAL CHARACTERISTICS OF Cr-Mo STEEL BARS USING THE MIG WELDING PROCEDURE
European Journal of Materials Science and Engineering
weldment
weld thermal cycle
mechanical properties
microstructure
title EFFECT OF WELD HEAT INPUT ON THE MECHANICAL CHARACTERISTICS OF Cr-Mo STEEL BARS USING THE MIG WELDING PROCEDURE
title_full EFFECT OF WELD HEAT INPUT ON THE MECHANICAL CHARACTERISTICS OF Cr-Mo STEEL BARS USING THE MIG WELDING PROCEDURE
title_fullStr EFFECT OF WELD HEAT INPUT ON THE MECHANICAL CHARACTERISTICS OF Cr-Mo STEEL BARS USING THE MIG WELDING PROCEDURE
title_full_unstemmed EFFECT OF WELD HEAT INPUT ON THE MECHANICAL CHARACTERISTICS OF Cr-Mo STEEL BARS USING THE MIG WELDING PROCEDURE
title_short EFFECT OF WELD HEAT INPUT ON THE MECHANICAL CHARACTERISTICS OF Cr-Mo STEEL BARS USING THE MIG WELDING PROCEDURE
title_sort effect of weld heat input on the mechanical characteristics of cr mo steel bars using the mig welding procedure
topic weldment
weld thermal cycle
mechanical properties
microstructure
url https://ejmse.ro/articles/07_01_01_EJMSE-21-148.pdf
work_keys_str_mv AT reubenadebareadewuyi effectofweldheatinputonthemechanicalcharacteristicsofcrmosteelbarsusingthemigweldingprocedure
AT oluwasayodorcasolakolegan effectofweldheatinputonthemechanicalcharacteristicsofcrmosteelbarsusingthemigweldingprocedure
AT emanuelabiodunakeju effectofweldheatinputonthemechanicalcharacteristicsofcrmosteelbarsusingthemigweldingprocedure