Paper Title:
Microstructural Effects on Low Cycle Fatigue of Sn-3.8Ag-0.7Cu Pb-Free Solder
  Abstract

Low cycle fatigue behavior of Sn-3.8Ag-0.7Cu solder was investigated under fully reversed cyclic loading, with particular emphasis on microstructural effects. The LCF behavior of the solder with equiaxed microstructure was found to differ greatly from that of the solder with a dendrite microstructure. At a given total strain amplitude, the dendrite microstructure exhibited a much longer fatigue life than the equiaxed microstructure. Such a strong microstructural effect on fatigue life arose from the difference in cyclic deformation and fracture mechanisms between the two microstructures. A large number of microcracks along grain boundaries of the equiaxed structure solder developed with increasing cycling, while for the dendrite structure solder, cyclic deformation took place along the direction of the maximal shear stress during fatigue tests and microcracks initiated and propagated along shear deformation bands. Besides, the fatigue behavior of the dendritic microstructure was very sensitive to cyclic frequency whereas the fatigue behavior of the equiaxed microstructure showed less sensitivity to cyclic frequency.

  Info
Periodical
Key Engineering Materials (Volumes 345-346)
Edited by
S.W. Nam, Y.W. Chang, S.B. Lee and N.J. Kim
Pages
239-242
DOI
10.4028/www.scientific.net/KEM.345-346.239
Citation
Q. L. Zeng, Z. G. Wang, J.K. Shang, "Microstructural Effects on Low Cycle Fatigue of Sn-3.8Ag-0.7Cu Pb-Free Solder", Key Engineering Materials, Vols. 345-346, pp. 239-242, 2007
Online since
August 2007
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Lilia R. Saitova, Heinz Werner Höppel, Matthias Göken, A.R. Kilmametov, Irina P. Semenova, Ruslan Valiev
Abstract:Ti-6Al-4V ELI (extra low interstitials) was processed by equal channel angular pressing in order to obtain an ultrafine-grained (UFG)...
827
Authors: K.H. Yoon, S.I. Kwun, Yun Mo Yeon
Abstract:The fatigue properties of friction stir (FS) and TIG welded Al 6N01-T5 alloys were compared in the present study. The low cycle fatigue (LCF)...
593
Authors: Qing Juan Wang, Zhong Ze Du, Xiao Yan Liu, Ludvík Kunz
Abstract:The fatigue life, cyclic deformation behavior and microstructure of ultra-fine grained (UFG) copper produced by equal-channel angular...
231
Authors: Shu Ying Yin, Li Jia Chen, Xin Wang
Building Materials
Abstract:In order to identify the influence of solid solution, aging and solid solution plus aging treatments on the low-cycle fatigue behavior of the...
883
Authors: Yu Li Gu, Yu Huai He, Chang Kui Liu, Chun Hu Tao
Chapter 2: Applications of Materials in Manufacturing Technologies, Materials Science and Engineering
Abstract:Low cycle fatigue failure tests of the powder metallurgical nickel based superalloy FGH96 at 550°C and 720°C were carried out under total...
418