Superplastic creep of AuSn eutectic solder alloy. (15th July 2016)

• Record Type: Journal Article
• Authors: Elmer, J.W.; Mulay, R.P.
• Is Part Of: Scripta materialia. Volume 120(2016)
• Page Start: 14
• Page End: 18
• Publication Date: 2016-07-15
• Subjects: Creep -- Superplasticity -- Grain boundary sliding -- Coarsening -- Strain rate; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2016.03.031
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: The large-strain tensile creep behavior of Au80 Sn20 wt.% eutectic was studied at temperatures between 125 °C and 200 °C. Constant load creep experiments were performed and a power law relationship was created from this data to predict creep as a function of stress and temperature with a best-fit stress exponent n = 2.1 and activation energy for creep of Q = 148.4 kJ/mol. Results show that the favorable creep resistance of AuSn reduces considerably at temperatures above 125 °C, having 1000 × higher creep rate at 200 °C than 125 °C. Of particular note is the observation of superplasticity in AuSn, with failure strains reaching 740% at 200 °C. Graphical abstract: