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Author

Park, Sung Soo
Metal Alloy Design (MADe) Lab
Research Interests
  • Metals and alloys, materials properties (mechanical/physical/electrochemical/functional), biomedical implants, metals corrosion

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Effect of nano-particles on the creep resistance of Mg-Sn based alloys

Cited 52 times inthomson ciCited 44 times inthomson ci
Title
Effect of nano-particles on the creep resistance of Mg-Sn based alloys
Author
Kang, D. HPark, Sung SooOh, Yoon S.Kim, Nack J.
Keywords
Cooling rate; Creep resistance; Load-relaxation test; Mg-Sn alloy; Nano-particles
Issue Date
200703
Publisher
ELSEVIER SCIENCE SA
Citation
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, v.448-451, no., pp.318 - 321
Abstract
A study has been made on the microstructure and high-temperature properties of die-cast Mg-Sn-Al-Si (TAS831) alloy. Microstructure of TAS831 alloy is characterized by the presence of thermally stable Mg2Sn nano-particles within the matrix. It also contains Mg2Sn and Mg2Si particles along grain boundaries. It has been shown that the morphology of matrix Mg2Sn particles varies depending on cooling rate, forming rod-type Mg2Sn particles at fast cooling rates and polygonal particles at slow cooling rates. Elevated-temperature creep tests show that the die-cast TAS831 alloy has superior creep resistance compared with commercial AZ91 alloy. Analyses of creep and load relaxation at elevated temperatures in the context of internal-variable theory indicate that the presence of thermally stable nano-particles within the matrix increases the resistance to dislocation movement, thereby improving the creep resistance.
URI
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DOI
http://dx.doi.org/10.1016/j.msea.2006.02.332
ISSN
0921-5093
Appears in Collections:
MSE_Journal Papers

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