Evaluation of joint defects on FSW of mg alloy using statistical method

T. Kinoshita, K. Hayashi, Shigeru Hamada, I. Shigematsu, Hiroshi Noguchi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

To select the welding conditions that can ensure a particular fatigue strength for safe use in a structure produced by the FSW (Friction Stir Welding) of Mg alloys, this paper proposes a method for determining the range of welding conditions that can ensure a particular joint defect size limit. The welding parameters used are the rotation speed of the tool ω and the welding speed v. Generally, a welding condition is selected using only the fatigue strength as an index. However, ensuring the fatigue strength in a particular welding condition does not insure the strength and reliability of a welded part, because actual welding is not typically carried out in a particular welding condition. Therefore, a range of conditions that can ensure a particular fatigue strength is required. Moreover, we also consider parameters that represent the factors that decrease fatigue strength, namely, √area, HV, and R, because the welding conditions that can ensure a particular fatigue strength are determined by an evaluation of these factors, as well. Therefore, in this study, a method for determining a range of welding conditions that can ensure a welding defect size limit is proposed. Furthermore, FSW welding tests were carried out and the validity of the proposed method was evaluated. X-ray transmission measurements were carried out to measure the welding defect size obtained using the method. Then, the prediction of the maximum welding defect size was carried out for a welding length of 25 [m], which is representative of body of a the Shinkansen rolling stock car.

Original languageEnglish
Title of host publication19th European Conference on Fracture
Subtitle of host publicationFracture Mechanics for Durability, Reliability and Safety, ECF 2012
PublisherEuropean Conference on Fracture, ECF
ISBN (Print)978-5-905576-18-8
Publication statusPublished - Jan 1 2012
Event19th European Conference on Fracture: Fracture Mechanics for Durability, Reliability and Safety, ECF 2012 - Kazan, Russian Federation
Duration: Aug 26 2012Aug 31 2012

Publication series

Name19th European Conference on Fracture: Fracture Mechanics for Durability, Reliability and Safety, ECF 2012

Other

Other19th European Conference on Fracture: Fracture Mechanics for Durability, Reliability and Safety, ECF 2012
CountryRussian Federation
CityKazan
Period8/26/128/31/12

Fingerprint

Friction stir welding
Statistical methods
Welding
Defects
Railroad rolling stock

All Science Journal Classification (ASJC) codes

  • Safety, Risk, Reliability and Quality

Cite this

Kinoshita, T., Hayashi, K., Hamada, S., Shigematsu, I., & Noguchi, H. (2012). Evaluation of joint defects on FSW of mg alloy using statistical method. In 19th European Conference on Fracture: Fracture Mechanics for Durability, Reliability and Safety, ECF 2012 (19th European Conference on Fracture: Fracture Mechanics for Durability, Reliability and Safety, ECF 2012). European Conference on Fracture, ECF.

Evaluation of joint defects on FSW of mg alloy using statistical method. / Kinoshita, T.; Hayashi, K.; Hamada, Shigeru; Shigematsu, I.; Noguchi, Hiroshi.

19th European Conference on Fracture: Fracture Mechanics for Durability, Reliability and Safety, ECF 2012. European Conference on Fracture, ECF, 2012. (19th European Conference on Fracture: Fracture Mechanics for Durability, Reliability and Safety, ECF 2012).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Kinoshita, T, Hayashi, K, Hamada, S, Shigematsu, I & Noguchi, H 2012, Evaluation of joint defects on FSW of mg alloy using statistical method. in 19th European Conference on Fracture: Fracture Mechanics for Durability, Reliability and Safety, ECF 2012. 19th European Conference on Fracture: Fracture Mechanics for Durability, Reliability and Safety, ECF 2012, European Conference on Fracture, ECF, 19th European Conference on Fracture: Fracture Mechanics for Durability, Reliability and Safety, ECF 2012, Kazan, Russian Federation, 8/26/12.
Kinoshita T, Hayashi K, Hamada S, Shigematsu I, Noguchi H. Evaluation of joint defects on FSW of mg alloy using statistical method. In 19th European Conference on Fracture: Fracture Mechanics for Durability, Reliability and Safety, ECF 2012. European Conference on Fracture, ECF. 2012. (19th European Conference on Fracture: Fracture Mechanics for Durability, Reliability and Safety, ECF 2012).
Kinoshita, T. ; Hayashi, K. ; Hamada, Shigeru ; Shigematsu, I. ; Noguchi, Hiroshi. / Evaluation of joint defects on FSW of mg alloy using statistical method. 19th European Conference on Fracture: Fracture Mechanics for Durability, Reliability and Safety, ECF 2012. European Conference on Fracture, ECF, 2012. (19th European Conference on Fracture: Fracture Mechanics for Durability, Reliability and Safety, ECF 2012).
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