Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
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Mechanical Behavior and Physical Properties of Zr-Ti-Cu-Ni-Be Amorphous and Partially Crystallized Alloy Extracted from a Commercial Golf Club Head

Zr-Ti-Cu-Ni-Be 합금으로 제조된 상용 골프클럽헤드의 부위별 물리적 특성 및 기계적 거동

  • Choi, Young-Chul (Department of Metallurgical Engineering, Chungnam National University) ;
  • Hong, Sun-Ig (Department of Metallurgical Engineering, Chungnam National University)
  • Published : 2005.11.01
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Abstract

The deformation behavior of a bulk amorphous and crystallized amorphous $Zr_{22.5}Ti_{14}Cu_{12.5}Ni_{10}Be_{22.5}$ alloy extracted from a commercial golf club head was characterized at room temperature ana $300^{\circ}C$. At room temperature, amorphous specimens revealed higher yield stress and ductility than partially crystallized alloy specimens. Amorphous alloy displayed some plasticity before fracture, which resulted from strain hardening and repeated crack initiation and propagation. The fracture is mainly localized on one major shear band, and the compressive fracture angle of the amorphous specimen between the stress axis and the fracture plane was about $40^{\circ}$ Scanning electron microscope observations revealed mainly a vein-like structure in the amorphous alloy But the fracture surface of partially crystallized amorphous alloy consisted of vein-like and featureless fracture structure. The partially crystallized alloy extracted from the thick part of the club fractured in the elastic region, at a much lower stress level than the amorphous, suggesting that relatively coarse crystal particles formed during cooling cause the brittle fracture.

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References

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