Influence of strain rate on fracture mechanism of Mg-Gd-Y alloy

Fan Zhang; Chengwen Tan; Xiaodong Yu; Honglei Ma; Fuchi Wang; Hongnian Cai

doi:10.3969/j.issn.0258-7076.2011.05.006

Influence of strain rate on fracture mechanism of Mg-Gd-Y alloy

Fan Zhang^*, Chengwen Tan, Xiaodong Yu, Honglei Ma, Fuchi Wang, Hongnian Cai

^*Corresponding author for this work

School of Material Science and Engineering

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

Abstract

The influence of strain rate on the fracture mechanism of Mg-Gd-Y alloy was investigated. The quasi-static compression tests were conducted by using the servo-hydraulic testing machine. High strain rate experiments with 1 × 10³s^-1 and 1 × 10⁴s^-1 were performed on the split Hopkinson compression bar and ballistic impact, respectively. The results indicated that the brittle cleavage fracture was the main failure mode at a strain rate of 1 × 10^-3s^-1. At a strain rate of 1 × 10³ s^-1, hot-softening bands were observed and deformation localization was responsible for the fracture of alloy. With the increase of strain rate up to 1 × 10⁴s^-1, adiabatic shear band led to the failure of material in the stage of stable penetration. In addition, transformation bands were formed and therefore the increase of strain rate was benefit for the formation of transformation bands.

Original language	English
Pages (from-to)	662-666
Number of pages	5
Journal	Xiyou jinshu
Volume	35
Issue number	5
DOIs	https://doi.org/10.3969/j.issn.0258-7076.2011.05.006
Publication status	Published - Sept 2011

Keywords

Adiabatic shear band
Cleavage fracture
Deformation localization
Mg-Gd-Y alloy
Strain rate

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10.3969/j.issn.0258-7076.2011.05.006

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title = "Influence of strain rate on fracture mechanism of Mg-Gd-Y alloy",

abstract = "The influence of strain rate on the fracture mechanism of Mg-Gd-Y alloy was investigated. The quasi-static compression tests were conducted by using the servo-hydraulic testing machine. High strain rate experiments with 1 × 103s-1 and 1 × 104s-1 were performed on the split Hopkinson compression bar and ballistic impact, respectively. The results indicated that the brittle cleavage fracture was the main failure mode at a strain rate of 1 × 10-3s-1. At a strain rate of 1 × 103 s-1, hot-softening bands were observed and deformation localization was responsible for the fracture of alloy. With the increase of strain rate up to 1 × 104s-1, adiabatic shear band led to the failure of material in the stage of stable penetration. In addition, transformation bands were formed and therefore the increase of strain rate was benefit for the formation of transformation bands.",

keywords = "Adiabatic shear band, Cleavage fracture, Deformation localization, Mg-Gd-Y alloy, Strain rate",

author = "Fan Zhang and Chengwen Tan and Xiaodong Yu and Honglei Ma and Fuchi Wang and Hongnian Cai",

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AU - Zhang, Fan

AU - Tan, Chengwen

AU - Yu, Xiaodong

AU - Ma, Honglei

AU - Wang, Fuchi

AU - Cai, Hongnian

PY - 2011/9

Y1 - 2011/9

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AB - The influence of strain rate on the fracture mechanism of Mg-Gd-Y alloy was investigated. The quasi-static compression tests were conducted by using the servo-hydraulic testing machine. High strain rate experiments with 1 × 103s-1 and 1 × 104s-1 were performed on the split Hopkinson compression bar and ballistic impact, respectively. The results indicated that the brittle cleavage fracture was the main failure mode at a strain rate of 1 × 10-3s-1. At a strain rate of 1 × 103 s-1, hot-softening bands were observed and deformation localization was responsible for the fracture of alloy. With the increase of strain rate up to 1 × 104s-1, adiabatic shear band led to the failure of material in the stage of stable penetration. In addition, transformation bands were formed and therefore the increase of strain rate was benefit for the formation of transformation bands.

KW - Adiabatic shear band

KW - Cleavage fracture

KW - Deformation localization

KW - Mg-Gd-Y alloy

KW - Strain rate

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Influence of strain rate on fracture mechanism of Mg-Gd-Y alloy

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Keywords

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