Microstructure-Properties: I Fracture Toughness - Materials Science ...
Microstructure-Properties: I Fracture Toughness - Materials Science ...
Microstructure-Properties: I Fracture Toughness - Materials Science ...
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15<br />
Objective<br />
Overview<br />
Crack<br />
Minimztn.<br />
Energy<br />
Absrptin.<br />
Inclusion effects<br />
• Graph plots variation<br />
in strength with (plane<br />
strain) toughness with<br />
varying sulfur contents<br />
in 0.45C-Ni-Cr-Mo<br />
steels.<br />
• Increasing levels of S<br />
lead to lower<br />
toughness at the same<br />
strength level.<br />
• This occurs because<br />
the sulfur is present as<br />
sulfide inclusions in<br />
the steel.<br />
• “Clean steel”<br />
technologies have<br />
reduced this problem<br />
in recent years. [Dieter]
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