Fracture analysis of pipe sleeve on extrusion flare-less pipe joints for aircraft hydraulic pipe

Fengmei Xue, Fuguo Li, Jiang Li, Wenjun Yu, Jianfei Li

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Scopus citations

Abstract

The forming process of aircraft hydraulic pipe joints is investigated through experiments and analyses to solve the cracking problem of pipe sleeve on extrusion flare-less pipe joints. It can be concluded that the internal cause of the fracture failure is connected with the content, shape and distribution of δ-ferrite in 0Cr12Mn5Ni4Mo3Al high strength stainless steel, and the external cause is associated with the bearing behavior in the extrusion-bulging process of pipe sleeve. The crack is formed in the criss-crossing section of δ-ferrite on the function of shear stress in the stress concentration position, which belongs to ductile deformed crack. It eventually induces the intergranular fracture of pipe sleeve along the long axis with the expanding of subsequent crack.

Original languageEnglish
Title of host publicationMaterials Processing Technology
Pages1087-1090
Number of pages4
DOIs
StatePublished - 2011
Event2011 International Conference on Advanced Engineering Materials and Technology, AEMT 2011 - Sanya, China
Duration: 29 Jul 201131 Jul 2011

Publication series

NameAdvanced Materials Research
Volume291-294
ISSN (Print)1022-6680

Conference

Conference2011 International Conference on Advanced Engineering Materials and Technology, AEMT 2011
Country/TerritoryChina
CitySanya
Period29/07/1131/07/11

Keywords

  • 0Cr12Mn5Ni4Mo3Al
  • Extrusion flare-less pipe joints
  • Fracture analysis
  • Pipe sleeve

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