Fracture properties at ambient temperatures of iron aluminides fabricated by reactive hot-pressing

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Osaka Univ, Osaka, Japan [1 ]
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Scripta Mater | / 10卷 / 1477-1482期
关键词：
Alloying - Bond strength (chemical) - Dislocations (crystals) - Fracture mechanics - Fracture toughness - Grain boundaries - Hot pressing - Hydrogen embrittlement - Iron alloys - Mechanical testing - Strengthening (metal) - Stress intensity factors;
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摘要：
The fracture properties of Fe-40at%Al alloys fabricated by reactive hot-pressing was investigated under various types of testing conditions. Fracture toughness of the alloys exhibited significant loading rate dependence due to the environmental effect. The grain boundary cohesion in the non doped alloy was inherently weaker than its cleavage strength. In addition, the environmental embrittlement of the alloys rapidly accelerated at a critical applied stress intensity factor.
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