JCAA/JG-PP Lead-Free Solder Project:
Vibration Test
Boeing Electronics Materials and Processes Report - 582, Revision A
(EM/P-582, Rev. A)
Contract No: BM3419-01
Prepared for ITB, Inc.
January 9, 2006
I have this paper and others. They are in the public domain. I Googled the title of the paper and ended up at http://www.acqp2.nasa.gov/ where there are a multiplicity of papers on vibration results for differing packages and differing alloys
Rex Waygood
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-----Original Message-----
From: Leadfree [mailto:[log in to unmask]] On Behalf Of Deng, Peter (Shenzhen)
Sent: 09 December 2008 09:16
To: [log in to unmask]
Subject: Re: [LF] vibration testing of tin-lead and lead-free solder joints
Joseph,
Your kind to dig out the link is appreciated, I am interested in detail.
Thanks.
Regards / Peter Deng
D +86(0)755 2671 0624
M ( +86) 138 2876 8267
-----Original Message-----
From: Leadfree [mailto:[log in to unmask]] On Behalf Of Joe Fjelstad
Sent: 2008年12月9日 4:45
To: [log in to unmask]
Subject: [LF] vibration testing of tin-lead and lead-free solder joints
Greetings folks
Found this on the wires today... (Cut it earlier out but lost the link but I am sure I am not the only one who read it. However I can go dig it up if
there is interest)
Why are we still using lead-free solder again? So it goes....
Joe
"Davide de Maio of National Physical Laboratory discussed the high frequency vibration testing of tin-lead and lead-free solder joints, with reference to automotive and aerospace electronics--a grim reminder that 80% of failures in airborne electronics were attributable to vibration and shock. A test piece had been designed representing a single solder joint between two copper components, which was tested to failure at frequencies of 400Hz and 800Hz. A range of SAC lead-free solders had been evaluated, with tin-lead as a comparison.
The tin-lead solder outperformed the lead-free examples, especially at the higher frequency. In general, failure occurred at or near the intermetallic interface, which would be expected to be the most stressed area. Of the SAC alloys, performance at 400Hz was better the higher the silver content. Annealing of SAC had a deleterious effect on performance at both 400Hz and 800Hz."
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