|About this Abstract
||2011 TMS Annual Meeting & Exhibition
||Bulk Metallic Glasses VIII
||Zr-Based Glass-Forming Film for Fatigue-Property Improvements of 316L Stainless Steel: Annealing Effects
||Jinn P. Chu, Cheng-Min Lee, R. T. Huang, Jia-Hong Zhu, Peter. K. Liaw
|On-Site Speaker (Planned)
When annealed in the supercooled liquid region (ΔT), Zr<SUB>53</SUB>Cu<SUB>29</SUB>Al<SUB>12</SUB>Ni<SUB>6</SUB> metallic glass thin film exhibits a uniform structure relative to the metastable as-deposited film because of the annihilation of the columnar structure. Microstructure became condensed due to the structure relaxation and free volume equilibrated in the annealed film. Therefore, it is expected that the annealed Zr-based glass-forming film would improve mechanical properties such as high strength, enhanced ductility, and smooth surface, along with good adhesion to the substrate. These properties are considered to be key factors that will improve the fatigue resistance of materials. A fatigue test of coated 316L stainless steel was carried out. Under a stress of 750 MPa, the fatigue life was improved from 4.4 x 10<SUP>5</SUP> cycles of the uncoated sample by ~10 times to 4.5 x 10<SUP>6</SUP> cycles, and further improved by more than 22 times to 10<SUP>7</SUP> cycles when the annealing was applied.