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Nanoindentation study of size effect and loading rate effect on mechanical properties of a thin film metallic glass Cu49.3Zr50.7

หน่วยงาน Nanyang Technological University, Singapore

รายละเอียด

ชื่อเรื่อง : Nanoindentation study of size effect and loading rate effect on mechanical properties of a thin film metallic glass Cu49.3Zr50.7
นักวิจัย : Pang, Jianjun , Tan, Ming-Jen , Liew, K. M. , Shearwood, Christopher
คำค้น : DRNTU::Engineering::Materials::Testing of materials.
หน่วยงาน : Nanyang Technological University, Singapore
ผู้ร่วมงาน : -
ปีพิมพ์ : 2554
อ้างอิง : Pang, J. J., Tan, M. J., Liew, K. M., & Shearwood, C. (2011). Nanoindentation study of size effect and loading rate effect on mechanical properties of a thin film metallic glass Cu49.3Zr50.7. Physica B : condensed matter, 407(3), 340-346. , 0921-4526 , http://hdl.handle.net/10220/17740 , http://dx.doi.org/10.1016/j.physb.2011.10.050
ที่มา : -
ความเชี่ยวชาญ : -
ความสัมพันธ์ : Physica B : condensed matter
ขอบเขตของเนื้อหา : -
บทคัดย่อ/คำอธิบาย :

A binary metallic glass (MG) Cu49.3Zr50.7 in the form of thin film was successfully grown on a Si (1 0 0) substrate by magnetron sputtering. The mechanical properties, specifically, hardness and modulus at various peak loads and loading rates were characterized through instrumented nanoindentation. Unlike other metallic glasses showing an indentation size effect (ISE), the composition of this study does not have an ISE, which is phenomenologically the result of the negligible length scale according to the strain gradient plasticity model. The proportional specimen resistance model is applicable to the load–displacement behaviors and suggests that the frictional effect is too small to contribute to the ISE. The occurrence of plasticity depends on loading rates and can be delayed so that the displacement during the load holding segment increases logarithmically. In addition, the hardness and modulus are both dependent on the loading rates as well, i.e., they increase as the loading rate increases up to 0.1 mN/s and then hold constant, which is independent of creep time (≤100 s). These loading-rate-dependent behaviors are interpreted as the result of viscoelastic effect rather than free volume kinetics.

บรรณานุกรม :
Pang, Jianjun , Tan, Ming-Jen , Liew, K. M. , Shearwood, Christopher . (2554). Nanoindentation study of size effect and loading rate effect on mechanical properties of a thin film metallic glass Cu49.3Zr50.7.
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Pang, Jianjun , Tan, Ming-Jen , Liew, K. M. , Shearwood, Christopher . 2554. "Nanoindentation study of size effect and loading rate effect on mechanical properties of a thin film metallic glass Cu49.3Zr50.7".
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Pang, Jianjun , Tan, Ming-Jen , Liew, K. M. , Shearwood, Christopher . "Nanoindentation study of size effect and loading rate effect on mechanical properties of a thin film metallic glass Cu49.3Zr50.7."
    กรุงเทพมหานคร : Nanyang Technological University, Singapore, 2554. Print.
Pang, Jianjun , Tan, Ming-Jen , Liew, K. M. , Shearwood, Christopher . Nanoindentation study of size effect and loading rate effect on mechanical properties of a thin film metallic glass Cu49.3Zr50.7. กรุงเทพมหานคร : Nanyang Technological University, Singapore; 2554.