Brittle Fracture of Cast Low- Alloy Steel Jaws Because of Shrinkage Porosity and Low Ductility of Case and Core
The specially designed sand-cast low-alloy steel jaws that were implemented to stretch the wire used in prestressed concrete beams fractured. The fractures were found to be macroscale brittle and exhibited very little evidence of deformation. The surface of the jaws was disclosed by metallographic examination to be case carburized. The case was found to be martensite with small spheroidal carbides while the core consisted of martensite plus some ferrite. The fracture was revealed to be related to shrinkage porosity. Tempering was revealed to be probably limited to about 150 deg C by the hardness values (close to the maximum...
Brittle Fracture of Cast Low- Alloy Steel Jaws Because of Shrinkage Porosity and Low Ductility of Case and Core, ASM Failure Analysis Case Histories: Machine Tools and Manufacturing Equipment, ASM International, 2019, https://doi.org/10.31399/asm.fach.machtools.c0089534
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