Practical Failure Analysis

, Volume 1, Issue 5, pp 69–76 | Cite as

An investigation of the development of defects during flow forming of high strength thin wall steel tubes

  • K. M. Rajan
  • K. Narasimhan
Peer Reviewed Articles


Flow forming technology has emerged as a promising, economical metal forming technology due to its ability to provide high strength, high precision, thin walled tubes with excellent surface finish. This paper presents experimental observations of defects developed during flow forming of high strength SAE 4130 steel tubes. The major defects observed are fish scaling, premature burst, diametral growth, microcracks, and macrocracks. This paper analyzes the defects and arrives at the causative factors contributing to the various failure modes.


metal forming inclusions expert system microstructure surface finish 


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Copyright information

© ASM International - The Materials Information Society 2001

Authors and Affiliations

  • K. M. Rajan
    • 1
  • K. Narasimhan
    • 2
  1. 1.Armament Research and Development EstablishmentPuneIndia
  2. 2.Department of Metallurgical Engineering and Materials ScienceIITBombayIndia

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