Influence of pre-deformation of 5052H112 alloy on tensile properties and fracture resistance under vibration

Kuo Tsung Huang, Shih Hsien Chang, Truan-Sheng Lui

Research output: Contribution to journalArticle

Abstract

This study prepared a 5052H112 alloy under different cold-rolled reductions to explore its microstructure and mechanical properties. The experimental results indicated that the cold-rolled specimens had good tensile properties and better vibration fracture resistance, due to the high densities of dislocation and small aspect ratio of crystal grain. The stress-elongation curves of all specimens showed the serrated yielding. The high densities of dislocation and small aspect ratio of crystal grain introduced by cold-rolling could hold the mobile dislocations long enough to let Mg atoms form atmospheres around them. In addition, the crack propagation behavior of all specimens showed that slip bands can be observed in the vicinity of the main crack and be suppressed by increasing the cold-rolled reduction. Crack propagation showed that rolled specimens exhibit decreasing crack propagation rates with increased matrix strengthening (cold-rolling). Therefore, it can be concluded that a large number of dislocation tangles introduced by cold-rolling are effective in improving mechanical properties.

Original languageEnglish
Pages (from-to)236-241
Number of pages6
JournalMaterials Transactions
Volume56
Issue number2
DOIs
Publication statusPublished - 2015 Jan 1

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tensile properties
Cold rolling
fracture strength
Tensile properties
cold rolling
Fracture toughness
Crack propagation
crack propagation
Dislocations (crystals)
vibration
Aspect ratio
aspect ratio
Mechanical properties
Crystals
mechanical properties
Elongation
edge dislocations
elongation
crystals
Cracks

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

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abstract = "This study prepared a 5052H112 alloy under different cold-rolled reductions to explore its microstructure and mechanical properties. The experimental results indicated that the cold-rolled specimens had good tensile properties and better vibration fracture resistance, due to the high densities of dislocation and small aspect ratio of crystal grain. The stress-elongation curves of all specimens showed the serrated yielding. The high densities of dislocation and small aspect ratio of crystal grain introduced by cold-rolling could hold the mobile dislocations long enough to let Mg atoms form atmospheres around them. In addition, the crack propagation behavior of all specimens showed that slip bands can be observed in the vicinity of the main crack and be suppressed by increasing the cold-rolled reduction. Crack propagation showed that rolled specimens exhibit decreasing crack propagation rates with increased matrix strengthening (cold-rolling). Therefore, it can be concluded that a large number of dislocation tangles introduced by cold-rolling are effective in improving mechanical properties.",
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Influence of pre-deformation of 5052H112 alloy on tensile properties and fracture resistance under vibration. / Huang, Kuo Tsung; Chang, Shih Hsien; Lui, Truan-Sheng.

In: Materials Transactions, Vol. 56, No. 2, 01.01.2015, p. 236-241.

Research output: Contribution to journalArticle

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