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Nanoindentation creep of tin and aluminium : a comparative study between constant load and constant strain rate methods

หน่วยงาน Nanyang Technological University, Singapore

รายละเอียด

ชื่อเรื่อง : Nanoindentation creep of tin and aluminium : a comparative study between constant load and constant strain rate methods
นักวิจัย : Shen, Lu , Cheong, Davy Wun Chet , Foo, Yong Lim , Chen, Zhong
คำค้น : DRNTU::Engineering::Materials
หน่วยงาน : Nanyang Technological University, Singapore
ผู้ร่วมงาน : -
ปีพิมพ์ : 2554
อ้างอิง : http://hdl.handle.net/10220/11314 , http://dx.doi.org/10.1016/j.msea.2011.11.016
ที่มา : -
ความเชี่ยวชาญ : -
ความสัมพันธ์ : Materials science and engineering: A
ขอบเขตของเนื้อหา : -
บทคัดย่อ/คำอธิบาย :

Creep properties of polycrystalline Tin (Sn) and single crystal Aluminium (Al) were studied by two nanoindentation methods, i.e., constant load (CL) test and constant strain rate (CSR) test. The indentation strain rate and stress were calculated as the analogies drawn from uniaxial creep analysis. The stress exponent was expressed as the slope of the strain rate–stress curves plotted in the double logarithm scale. Between the two testing methods, the CSR test was clearly shown to be able to detect the creep of Sn in the power-law region, where the grain size had little effect on the creep rate. However, it was found that steady-state creep could not be achieved in the CL test. This has imposed ambiguities in applying the creep analysis developed from conventional creep scheme. The creep displacement from CL test was found unrepeatable for multiple measurements. CL test also has a smaller accessible stress range than that from a CSR test. The gradual variation of the stress exponents, especially for the small grain Sn sample, during holding process in the CL test could be due to the participation of the other rate controlling mechanisms which were closely related to the non-steady-state creep behaviour.

บรรณานุกรม :
Shen, Lu , Cheong, Davy Wun Chet , Foo, Yong Lim , Chen, Zhong . (2554). Nanoindentation creep of tin and aluminium : a comparative study between constant load and constant strain rate methods.
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Shen, Lu , Cheong, Davy Wun Chet , Foo, Yong Lim , Chen, Zhong . 2554. "Nanoindentation creep of tin and aluminium : a comparative study between constant load and constant strain rate methods".
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Shen, Lu , Cheong, Davy Wun Chet , Foo, Yong Lim , Chen, Zhong . "Nanoindentation creep of tin and aluminium : a comparative study between constant load and constant strain rate methods."
    กรุงเทพมหานคร : Nanyang Technological University, Singapore, 2554. Print.
Shen, Lu , Cheong, Davy Wun Chet , Foo, Yong Lim , Chen, Zhong . Nanoindentation creep of tin and aluminium : a comparative study between constant load and constant strain rate methods. กรุงเทพมหานคร : Nanyang Technological University, Singapore; 2554.