Hot tearing is a complex thermomechanical phenomenon occurring in the semi-solid region. Strain in this region can induce cracking and localized alloying element segregation. An apparatus for investigating hot tearing was developed utilizing a servo-motor controlled cylinder to apply a pre-determined amount of strain to the solidifying shell. A special mold was developed using filling and solidification modeling to ensure that dendrite growth was perpendicular to applied strain. A computer-automated system was utilized to control the strain and strain rate and measure the force and displacement. Solidification experiments utilizing AISI 1020 steel validated the apparatus capabilities and optimized testing parameters.
Y. Lu et al., "New Experimental Apparatus to Investigate Hot Tearing Behavior in Steel," Proceedings of the AISTech 2020 (2020, Cleveland, OH), pp. 1460 - 1469, Association for Iron & Steel Technology (AIST), Sep 2020.
The definitive version is available at https://doi.org/10.33313/380/157
AISTech 2020 (2020: Aug. 31-Sep. 3, Cleveland, OH)
Materials Science and Engineering
Peaslee Steel Manufacturing Research Center
Keywords and Phrases
Hot Tearing; Strain and Strain Rate; Directional Solidification
Article - Conference proceedings
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03 Sep 2020