Deformation Mechanisms in a Mg-4Y-3RE Alloy

Kariya, Ryoichi; Iwasaki, Hajime; Mori, Takasuke; Mohri, Takeshi; Mabuchi, Mamoru; Nakamura, Minoru; Asahina, Tadashi; Higashi, Kenji

doi:10.4028/www.scientific.net/msf.350-351.93

Cited by 4 publications

(2 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…• C. 15) The supreme superplastic behavior of the commercial Mg alloys can be applied in the press forming 16) or press forging process for making Mg enclosures for electromagnetic shielding purpose concerned in the 3C (computer, communication and consumer electronic) industry.…”

Section: Introductionmentioning

confidence: 99%

High Strain Rate and/or Low Temperature Superplasticity in AZ31 Mg Alloys Processed by Simple High-Ratio Extrusion Methods

Lin

Huang

2002

Mater. Trans.

View full text Add to dashboard Cite

There have been numerous efforts in processing metallic alloys into fine-grained materials, so as to exhibit high strain rate superplasticity (HSRSP) and/or low temperature superplasticity (LTSP). The current study applied the most simple and feasible one-step extrusion method on the commercial AZ31 magnesium ingot to result in HSR<SP. The one-step extrusion was undertaken using a high extrusion ratio at 250-350 • C, and the grain size after one-step extrusion became ∼ 1-4 µm. The processed AZ31 plate exhibited satisfactory room temperature tensile elongation of 30-50%; 200 • C elongations of 600% at 1 × 10 −4 s −1 and 425% at 1 × 10 −3 s −1 ; and 300 • C elongations of 900% at 1 × 10 −4 s −1 , 520% at 8 × 10 −3 s −1 , 300% at 2 × 10 −2 s −1 , and 210% at 1 × 10 −1 s −1 . This suggests that the current AZ31 Mg alloy has possessed HSRSP at relatively low temperatures of 280-300 • C, as well as LTSP at 200 • C. The low flow stress of 15-30 MPa and the true strain rate sensitivity of 0.3-0.4 both suggest that grain boundary sliding and solute drag creep have operated under these loading conditions. The current results imply that the simple high-ratio extrusion method might be a feasible processing mean for industry applications.

show abstract

Section: Introductionmentioning

confidence: 99%

High Strain Rate and/or Low Temperature Superplasticity in AZ31 Mg Alloys Processed by Simple High-Ratio Extrusion Methods

Lin

Huang

2002

Mater. Trans.

View full text Add to dashboard Cite

show abstract

“…It is well known that addition of rare earth metals increases the high temperature strength and improves the creep resistance of magnesium alloys. [3][4][5][6] However, magnesium alloys containing rare earth metals are expensive.…”

Section: Introductionmentioning

confidence: 99%

Tensile Properties from Room Temperature to 673 K of Mg-0.9 mass%Ca Alloy Containing Lamella Mg<SUB>2</SUB>Ca

et al. 2002

Self Cite

View full text Add to dashboard Cite

Tensile properties were investigated from room temperature to 673 K of a binary Mg-0.9 mass%Ca alloy where Mg 2 Ca phase was dispersed as lamella. The 0.2% proof stress significantly increased by the Mg 2 Ca phase in the temperature range investigated. It was suggested that strengthening by stable lamella Mg 2 Ca in the grains and limitation of deformation related to grain boundaries by Mg 2 Ca phase at grain boundaries contribute to improvement of high temperature strength for the Mg-Ca alloy.

show abstract