Earticle

초록

영어

In this study, the mechanical properties and microstructure of a surface hardenings coating layers formed by laser cladding using bulk metallic glass (BMG) wire as a filler, have been evaluated. The fabricated powder shape as a filler metal was observed as sphericalness, which is suitable for laser welding. X-ray diffraction analysis observed that the powder was fully amorphous. The mechanical properties were measured by tensile strength tests and micro-hardness tests, whereas the microstructure and grain structure were analyzed by using a field emission scanning electron microscope and transmission electron microscope. Surface coating was carried out by laser cladding and gas tungsten arc welding (GTAW) processes. The tensile strengths of the laser-clad and GTAW coatings were determined to be 2.0 and 1.7 GPa, respectively. The tensile strength and micro-hardness of the laser-clad coating were about 15% and 14.3% higher, respectively, than those of the GTAW coating. Additionally, the laser-clad coating showed finer grains and fewer dendrites due to reduced dendrite distribution. The BMG layer was composed of a mixture of α-Fe and amorphous phases.

목차

Abstract
 1. Introduction
 2. Materials and Experimental Method
  2.1. Materials
  2.2. Experimental Methods
 3. Results and Discussion
  3.1. Amorphous Alloy Powder
  3.2. Mechanical Properties
  3.3. Microstructural Evaluation
 4. Conclusions
 References

키워드

저자

• Hanseop Lee [ Division of Mechanical Engineering, Graduate School, Kongju National University ]
• Byungchul Lim [ Division of Mechanical Engineering, Graduate School, Kongju National University ]
• Sangheup Park [ Division of Mechanical & Automotive Engineering, Kongju National University ]

참고문헌

발행기관

간행물

표지보기 관심저널 등록

• 간행물명

  International Journal of Multimedia and Ubiquitous Engineering

• 간기

  월간

• pISSN

  1975-0080

• 수록기간

  2008~2016

• 등재여부

  SCOPUS

• 십진분류

  KDC 505 DDC 605