DataVXPhilosophical Magazine LettersPaper
journal article·2022-07-03

Dislocation multiplication and dynamics in an aluminium alloy

Tiantian Huang, Fei Liu, Zhiyi Liu, Guangyu He, Yangcheng Hu

Philosophical Magazine Letters· Volume 102· Issue 7
Publisher page
Source abstract

Abstract

A mechanism of dislocation multiplication is introduced. The surface of the Al20Cu2Mn3 phase in an Al alloy can act as a barrier to impede dislocation movement. When two dislocations with opposite Burgers vectors approach each other, dislocations can annihilate if the pair remains at a distance less than the critical distance for annihilation. A dislocation loop is then formed around the Al20Cu2Mn3 phase or dislocations interact with the loop forming a dislocation tangle, which can promote dislocation multiplication. The driving force for dislocation reproduction, the dislocation glide velocity and the rate of dislocation multiplication are discussed.
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Research context

Metals & alloys

OpenAlex topics: Microstructure and mechanical properties · Aluminum Alloy Microstructure Properties · Aluminum Alloys Composites Properties

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

School of Materials Science and Engineering, Central South University, Changsha, People’s Republic of China

State Key Laboratory of High-Performance Complex Manufacturing, Central South University, Changsha, People’s Republic of China

Key Laboratory of Nonferrous Metal Materials Science and Engineering, Central South University, Changsha, People’s Republic of China

National Key Laboratory of Science and Technology on High-Strength Structural Materials, Central South University, Changsha, People’s Republic of China

Funding

National Key Research and Development Program of China · National Key Fundamental Research Project of China · National Natural Science Foundation of China

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