Thank you Werner,
Your latter (knowledge) statement confirms what I thought; if Pb doesn't segregate at GB of Sn, then why a "trace amount" of Pb would affect a long-term reliability of joints.
Vladimir
SENTEC
11 Canadian Road, Unit 7.
Scarborough, ON M1R 5G1
Tel: (416) 899-1882
Fax: (905) 882-8812
www.sentec.ca
-----Original Message-----
From: Werner Engelmaier <[log in to unmask]>
Date: Tue, 8 Dec 2009 17:29:37
To: <[log in to unmask]>
Subject: Re: [TN] SAC & LEAD (Pb) CONTAMINATION
Hi Vladimir,
I have seen no such data—and what I think is not relevant. what i know
would be, but i do not know anything about this.
Werner
-----Original Message-----
From: vladimir Igoshev <[log in to unmask]>
To: TechNet E-Mail Forum <[log in to unmask]>; Werner Engelmaier
<[log in to unmask]>
Sent: Tue, Dec 8, 2009 4:31 pm
Subject: Re: [TN] SAC & LEAD (Pb) CONTAMINATION
Werner,
Do you think (have data) that Pb tends to segregate at GB?
Regards,
Vladimir
SENTEC
------Original Message------
From: Werner Engelmaier
Sender: TechNet
To: [log in to unmask]
ReplyTo: TechNet E-Mail Forum
ReplyTo: Werner Engelmaier
Subject: Re: [TN] SAC & LEAD (Pb) CONTAMINATION
Sent: Dec 8, 2009 16:04
Hi Lee,
First Q: What is the source of this info?
Second: We have seen the incredible difference some of this
trace-additives can make; so why not Pb. But this is really
'undiscovered' territory.
Werner
-----Original Message-----
From: Lee Whiteman <[log in to unmask]>
To: [log in to unmask]
Sent: Tue, Dec 8, 2009 3:52 pm
Subject: [TN] SAC & LEAD (Pb) CONTAMINATION
Today, I read where if you added 0.5% Lead (Pb) into SAC, that the
fatigue life would be reduced from 18,670 to 8,089.
Question: How would the fatigue life react with Lead (Pb) levels in SAC
ranging from 0.0% (Baseline) through 1.0%? Is it a linear relationship
or exponential relationship?
Thanks again.
Lee Whiteman, PMP
Senior Member Engineering Staff
L-3 Communications East
Telephone: (856) 338-3508
FAX: (856) 338-2906
E-Mail: [log in to unmask]
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SENTEC
11 Canadian Road, Unit 7.
Scarborough, ON M1R 5G1
Tel: (416) 899-1882
Fax: (905) 882-8812
www.sentec.ca
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