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Title: Influence of thin-film metallic glass coating on fatigue behavior of bulk metallic glass: Experiments and finite element modeling

In this paper, a coating of the Zr-based thin-film metallic glass (TFMG) was deposited on the Zr 50Cu 30Al 10Ni 10 bulk metallic glass (BMG) to investigate shear-band evolution under four-point-bend fatigue testing. The fatigue endurance-limit of the TFMG-coated samples is ~ 33% higher than that of the BMG. The results of finite-element modeling (FEM) revealed a delay in the shear-band nucleation and propagation in TFMG-coated samples under applied cyclic-loading. The FEM study of spherical indentation showed that the redistribution of stress by the TFMG coating prevents localized shear-banding in the BMG substrate. Finally, the enhanced fatigue characteristics of the BMG substrates can be attributed to the TFMG coatings retarding shear-band initiation at defects on the surface of the BMG.
 [1] ;  [1] ;  [2] ;  [3] ;  [2] ;  [2] ;  [4]
  1. National Taiwan Univ. of Science and Technology, Taipei (Taiwan). Dept. of Materials Science and Engineering
  2. Univ. of Tennessee, Knoxville, TN (United States). Dept. of Materials Science and Engineering
  3. Univ. of New Mexico, Albuquerque, NM (United States). Dept. of Mechanical Engineering
  4. Tohoku Univ., Sendai (Japan). Inst. for Materials Research
Publication Date:
Grant/Contract Number:
FE0008855; FE0024054; FE0011194; W911NF-13-1-0438; CMMI-1100080; DMR-1611180; 104-2218-E-011-018; FE-0008855; FE-0024054; FE-0011194
Accepted Manuscript
Journal Name:
Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing
Additional Journal Information:
Journal Volume: 692; Journal ID: ISSN 0921-5093
Research Org:
Univ. of Tennessee, Knoxville, TN (United States); National Taiwan Univ. of Science and Technology, Taipei (Taiwan)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); USDOE Office of Fossil Energy (FE); US Army Research Office (ARO); National Science Foundation (NSF); Ministry of Science and Technology of Taiwan
Contributing Orgs:
Univ. of New Mexico, Albuquerque, NM (United States); Tohoku Univ., Sendai (Japan)
Country of Publication:
United States
36 MATERIALS SCIENCE; Metallic glass; Four-point-bend fatigue; Shear band; Finite-element modeling
OSTI Identifier:
Alternate Identifier(s):
OSTI ID: 1415896