Room Temperature Creep of a Tin-Lead Solder Wire under Self-Weight

Abstract:

Creep tests using a simple jig have been performed on 63 wt.% tin-37 wt.% lead solder wires of diameters 1 mm and 2 mm at room temperature (23°C). Coils containing 5 or 10 rings were allowed to creep under their own weight for 60 minutes. It was noted that for either of these diameter wires, the coil with 10 rings had significantly large vertical displacements as compared to those with 5 rings. In each particular coil, the highest vertical displacements were in the bottom rings. The overall maximum vertical displacement was 76.5 mm and this was in a bottom ring of the 2 mm diameter wire with 10 rings. However, in all cases, the amount of horizontal displacement was negligible. The bottom ring of the 2 mm diameter wire had the largest initial strain of 0.151 at 5 minutes and final strain of 0.546 at 60 minutes; this was in the coil with 10 rings. Although no consistent pattern in change between the initial and final diameters was noted for the rings in any coil even after 24 hours of creep, it was quite apparent that in a majority of cases a change in diameter occurred. The main factor responsible for the observed creep is attributed to the weight of the rings in the coils rather than capillary flow.

• Periodical: Advanced Engineering Forum (Volume 36)
• Pages: 76-96
• DOI: https://doi.org/10.4028/www.scientific.net/AEF.36.76
• Online since: June 2020
• Authors: Christopher C. Chama*
• Keywords: Creep, Displacement, Strain, Tin-Lead Solder

References

[1] O.D. Sherby and P.M. Burke, Mechanical behavior of crystalline solids at elevated temperature, Prog. Mater. Sci. 13 (1968) 325-386.

[2] S.Yang, Y. Zheng, Y. Duan and X. Ling, Creep characteristics and deformation analysis of service-exposed material using small punch creep test, Eng. Fract. Mech. 195 (2018) 242-252.

DOI: 10.1016/j.engfracmech.2018.04.025

[3] P. Dymáček, F. Dobeš, Y. Jirásková, N. Pizúrová and M. Friák, Tensile, creep and fracture testing of prospective Fe-Al-based alloys using miniature specimens, Theo. Appl. Fract. Mech. 99 (2019) 18-26.

DOI: 10.1016/j.tafmec.2018.11.005

[4] M. K. Sahota and J. R. Riddington, Compressive creep properties of lead alloys, Mater. Des. 21 (2000) 159-167.

DOI: 10.1016/s0261-3069(99)00095-3

[5] M.F. Ashby and D.R.H. Jones, Engineering Materials Vol. 1: An Introduction to Properties, Applications and Design, Elsevier, Amsterdam, 2012, pp.311-322.

[6] G.N. Haidemenopoulos, Physical Metallurgy: Principles and Design, CRC Press, London 2018 p.336, 377-382.

[7] H. P. Yao, Y. R. Zhao, X. L. Song, J. Jia and Z. D. Xiang, On the applicability of boundary condition based tensile creep model in predicting long-term creep strengths and lifetimes of engineering alloys, Euro. J. Mech. - A/Solids, 73 (2019) 57-66.

DOI: 10.1016/j.euromechsol.2018.07.008

[8] R.E. Reed-Hill and R. Abbaschian, Physical Metallurgy Principles, PWS Publishing Company, Boston, 1994, pp.849-896.

[9] W. Soboyejo, Mechanical Properties of Engineered Materials, Marcel Dekker, New York, 2003 pp.511-567.

[10] G.E. Dieter, Mechanical Metallurgy, McGraw-Hill, New York, 1976, pp.451-489.

[11] R.E. Smallman and A.H.W. Ngan, Modern Physical Metallurgy, Elsevier, Amsterdam, 2014, pp.571-583.