Microstructure and dynamic ultra-micro hardness of the as-cast and extruded Mg-Al-Ca-Sm alloys

Hyeon Taek Son, Jae Seol Lee, Ji Min Hong, Dae Guen Kim, K. Yoshimi, K. Maruyama

研究成果: Conference article査読

3 被引用数 (Scopus)

抄録

The as-cast microstructure of Mg-5Al-3Ca-2Sm alloy consists of equiaxed α-Mg matrix, (Mg, Al)2Ca eutectic phase and Al-Sm rich intermetallic compounds. This eutectic phase of the extruded alloys was elongated to extrusion direction and size of this phase was finered compare to that of as-cast alloys because of severe deformation during hot extrusion. After hot extrusion, the average grain size of Mg-5Al-3Ca and Mg-5Al-3Ca-2Sm alloys was 4.8 μm and 3.8 μm, respectively. In load-unload hardness test, penetration depth was decreased with added Sm and after extrusion procedure because of grain size refining by addition Sm and large deformation. Hardness value of the alloys containing Sm was higher than that of Mg-5Al-3Ca alloy due to grain refining and formation Al-Sm rich intermetallic compound at gain boundary and α-Mg matrix. Maximum hardness value was obtained at the extruded Mg-5Al-3Ca-2Sm alloy at elevated temperatures.

本文言語English
ページ(範囲)153-156
ページ数4
ジャーナルAdvanced Materials Research
24-25
DOI
出版ステータスPublished - 2007
イベントPRICM 6: The 6th Pacific Rim International Conference on Advanced Materials and Processing - Jeju Island, Korea, Republic of
継続期間: 2007 11 52007 11 9

ASJC Scopus subject areas

  • Engineering(all)

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