Microstructural Aspects of Fatigue Life of Sn-Zn Lead-free Solders with 1% of Ag Addition

• Autorzy: Pietrzak K. , Klasik A. , Maj M. , Sobczak N. , Wojciechowski A.

Identyfikatory

DOI

10.24425/118817

• Języki publikacji: EN

Abstrakty

EN

The article presents the study results of Sn-Zn lead-free solders with the various Zn content. The results concern the hypoeutectic, eutectic and hypereutectic alloys containing respectively 4.5% Zn, 9% Zn and 13.5% Zn. Moreover, these alloys contain the constant Ag (1%) addition. The aim of the study was to determine the microstructural conditionings of their fatigue life. In particular it was focused on answer the question what meaning can be assigned to the Ag addition in the chemical composition of binary Sn-Zn alloys. The research includes a qualitative and quantitative assessments of the alloy microstructures, that have been carried out in the field of light microscopy (LM). In order to determine some geometrical parameters of the microstructure of alloys the combinatorial method based on the phase quanta theory was applied. Moreover, for the identification necessities the chemical analyses in the micro-areas by SEM/EDS technics were also performed. Based on the SEM/EDS results the phases and intermetallic compounds existing in the examined lead-free solders were identified. The mechanical characteristics were determined by means of the modified low cycle test (MLCF). Based on this method and on the results obtained every time from only one sample the dozen of essential mechanical parameters were evaluated. The research results were the basis of analyzes concerning the effects of microstructural geometrical parameters of lead-free alloys studied on their fatigue life at ambient temperature.

Słowa kluczowe

EN

lead-free solders; microstructure; mechanical properties

PL

lutowanie bezołowiowe; mikrostruktura; właściwości mechaniczne

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2018
• Tom: Vol. 18, iss. 1
• Strony: 87--92
• Opis fizyczny: Bibliogr. 9 poz., rys.

Twórcy

autor

Pietrzak K.

• Institute of Precision Mechanics, Warsaw

autor

Klasik A.

• Motor Transport Institute, Warsaw

autor

Maj M.

• AGH University of Science and Technology, Faculty of Foundry Engineering, Krakow

autor

Sobczak N.

• Foundry Research Institute, Krakow

autor

Wojciechowski A.

• Institute of Precision Mechanics, Warsaw

Bibliografia

• [1] Liang Zhang, Song-bai Xue, Li-li Gao, Zhong Sheng, Huan Ye, Zheng-xiang Xiao, Guang Zeng, Yan Chen & Sheng-lin Yu. (2010). Development of Sn-Zn lead-free solders bearing alloying elements. Journal of Materials Science: Materials in Electronics. 21, 1-15.
• [2] Kudyba, A. (2016). Perspectives and directions for the development of new-generation lead-free solder and the possibility of their application in lead-free solder technology of consumer electronics. Prace Instytutu Odlewnictwa/Transactions of Foundry Research Institute. LVI(3), 233-260. (in Polish).
• [3] Song, J.M., Lan, G.F., Lui, T.S. & Chen, L.H. (2003). Microstructure and tensile properties of Sn–9Zn–xAg lead-free solder alloys. Scripta Materialia. 48, 1047-1051.
• [4] Pietrzak, K., Klasik, A., Maj, M., Wojciechowski, A. & Sobczak, N. (2017). Microstructural Aspects of Fatigue Parameters of Lead-Free Sn-Zn Solders with Various Zn Content. Archives of Foundry Engineering. 17(1), 131-136.
• [5] Pietrzak, K., Klasik, A., Maj, M, Sobczak, N., Wojciechowski, A. Comparative study of microstructure and fatigue life of selected unleaded solders in preparation for printing in Przeglądzie Spawalnictwa/ Welding Technology Review. (in Polish).
• [6] Maj, M. & Piekło, J. (2009). MLCF - an optimised program of low - cycle fatigue test to determine mechanical properties of cast materials. Archives of Metallurgy and Materials. 54(2), 393-397.
• [7] Kęsy, B.K. (1990). Microstructure as arrangement of unitary phase parts and stereological parameters Proceedings of 3rd Int. Conference on Stereology In Materials Science, Szczyrk, pp. 226 -231.
• [8] Mroziński, S. & Szala, J. (2011). Problem of cyclic hardening or softening in metals under programmed loading. Acta Mechanica et Automatica. 5(3), 99-106.
• [9] Maj, M. (2012). Fatigue life of selected casting alloys. Katowice-Gliwice: Wyd. Archives of Foundry Engineering. Monografia. (in Polish).

Uwagi

PL

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2018)