Burst Failure Analysis of Aluminum Alloy T-shaped Tube

Xiao Yao; Xu Xuefeng; Qiu Zeyu; Xiao Jie

doi:10.15980/j.tzzz.2018.07.022

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Burst Failure Analysis of Aluminum Alloy T-shaped Tube
Vol. 38, Issue 7, Pages: 776-779(2018)
Published： 2018 ，
DOI： 10.15980/j.tzzz.2018.07.022

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[1]肖尧,徐雪峰,邱泽宇,肖洁.铝合金三通管爆破失效分析[J].特种铸造及有色合金,2018,38(07):776-779.

Xiao Yao, Xu Xuefeng, Qiu Zeyu, et al. Burst Failure Analysis of Aluminum Alloy T-shaped Tube. [J]. Special Casting & Nonferrous Alloys 38(7):776-779(2018)
[1]肖尧,徐雪峰,邱泽宇,肖洁.铝合金三通管爆破失效分析[J].特种铸造及有色合金,2018,38(07):776-779. DOI： 10.15980/j.tzzz.2018.07.022.

Xiao Yao, Xu Xuefeng, Qiu Zeyu, et al. Burst Failure Analysis of Aluminum Alloy T-shaped Tube. [J]. Special Casting & Nonferrous Alloys 38(7):776-779(2018) DOI： 10.15980/j.tzzz.2018.07.022.

摘要

采用能谱分析仪、金相显微镜、硬度计、扫描电镜对爆破失效的航空用内高压成形铝合金三通管断口处的化学成分、组织形貌及硬度进行了分析与观察。结果表明

失效断口为韧性断裂。内高压成形三通管因加工硬化导致耐压强度高于母管

其肩部在载荷作用下发生减薄

最早屈服瞬断并向两端延伸。针对内压导致三通管肩部严重减薄

可适当增加厚度以提升其在工作环境下的耐压强度。

Abstract

The macro and micro feature

chemical composition of fracture surface

metallography and hardness of burst failure aluminum alloy T-shaped tube were analyzed by SEM

EDS and optical microscope.The results reveal that the failure fracture is characterized by ductile fracture.Hydroforming Tshaped tube has a higher compressive strength compared with tube billet due to working hardening

and the shoulder is severely thinned under the internal pressure.What’s more

the instantaneous fracture was formed at the shoulder of T-shaped tube and then extended to both ends.The shoulder thickness of Tshaped tube should be appropriately increased to improve pressure resistance under the working environment.