Observation of fatigue microcracks and estimation of fatigue strength of a thin sheet arc welded part considering micro-ripples

Kazuki Matsuda; Shinji Kodama

doi:10.1016/j.ijfatigue.2020.106087

Observation of fatigue microcracks and estimation of fatigue strength of a thin sheet arc welded part considering micro-ripples

Kazuki Matsuda, Shinji Kodama

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

Abstract

Fatigue tests were conducted on a thin sheet arc welded part using two types of welding wires. Microscopic observations of specimens tested at the fatigue limit stress revealed that microcracks were initiated in the micro-ripples on the weld metal surface. Furthermore, a coarse ferrite structure often contains existing microcracks. A method for quantitatively evaluating the effects of microscopic irregularities on the weld metal surface and macroscopic toe shape on the fatigue strength is proposed. It was found that microscopic irregularities on weld metal have a significant impact on the fatigue limit, depending on their metallurgical structure.

Original language	English
Article number	106087
Journal	International Journal of Fatigue
Volume	145
DOIs	https://doi.org/10.1016/j.ijfatigue.2020.106087
Publication status	Published - Apr 2021
Externally published	Yes

All Science Journal Classification (ASJC) codes

Modelling and Simulation
General Materials Science
Mechanics of Materials
Mechanical Engineering
Industrial and Manufacturing Engineering

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10.1016/j.ijfatigue.2020.106087

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title = "Observation of fatigue microcracks and estimation of fatigue strength of a thin sheet arc welded part considering micro-ripples",

abstract = "Fatigue tests were conducted on a thin sheet arc welded part using two types of welding wires. Microscopic observations of specimens tested at the fatigue limit stress revealed that microcracks were initiated in the micro-ripples on the weld metal surface. Furthermore, a coarse ferrite structure often contains existing microcracks. A method for quantitatively evaluating the effects of microscopic irregularities on the weld metal surface and macroscopic toe shape on the fatigue strength is proposed. It was found that microscopic irregularities on weld metal have a significant impact on the fatigue limit, depending on their metallurgical structure.",

author = "Kazuki Matsuda and Shinji Kodama",

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AU - Matsuda, Kazuki

AU - Kodama, Shinji

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N2 - Fatigue tests were conducted on a thin sheet arc welded part using two types of welding wires. Microscopic observations of specimens tested at the fatigue limit stress revealed that microcracks were initiated in the micro-ripples on the weld metal surface. Furthermore, a coarse ferrite structure often contains existing microcracks. A method for quantitatively evaluating the effects of microscopic irregularities on the weld metal surface and macroscopic toe shape on the fatigue strength is proposed. It was found that microscopic irregularities on weld metal have a significant impact on the fatigue limit, depending on their metallurgical structure.

AB - Fatigue tests were conducted on a thin sheet arc welded part using two types of welding wires. Microscopic observations of specimens tested at the fatigue limit stress revealed that microcracks were initiated in the micro-ripples on the weld metal surface. Furthermore, a coarse ferrite structure often contains existing microcracks. A method for quantitatively evaluating the effects of microscopic irregularities on the weld metal surface and macroscopic toe shape on the fatigue strength is proposed. It was found that microscopic irregularities on weld metal have a significant impact on the fatigue limit, depending on their metallurgical structure.

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JO - International Journal of Fatigue

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Observation of fatigue microcracks and estimation of fatigue strength of a thin sheet arc welded part considering micro-ripples

Abstract

All Science Journal Classification (ASJC) codes

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