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Open AccessArticle

Mechanical Properties and Microstructure Characterization of AISI “D2” and “O1” Cold Work Tool Steels

Mechanical Engineering Department, Faculty of Engineering, King Abdulaziz University, P.O. box 344, Rabigh 21911, Saudi Arabia
Metals 2019, 9(11), 1169; https://doi.org/10.3390/met9111169
Received: 25 September 2019 / Revised: 27 October 2019 / Accepted: 28 October 2019 / Published: 30 October 2019
(This article belongs to the Special Issue Mechanical Properties and Microstructure of Forged Steel)
This research analyzes the mechanical properties and fracture behavior of two cold work tool steels: AISI “D2” and “O1”. Tool steels are an economical and efficient solution for manufacturers due to their superior mechanical properties. Demand for tool steels is increasing yearly due to the growth in transportation production around the world. Nevertheless, AISI “D2” and “O1” (locally made) tool steels behave differently due to the varying content of their alloying elements. There is also a lack of information regarding their mechanical properties and behavior. Therefore, this study aimed to investigate the plasticity and ductile fracture behavior of “D2” and “O1” via several experimental tests. The tool steels’ behavior under monotonic quasi-static tensile and compression tests was analyzed. The results of the experimental work showed different plasticity behavior and ductile fracture among the two tool steels. Before fracture, clear necking appeared on “O1” tool steel, whereas no signs of necking occurred on “D2” tool steel. In addition, the fracture surface of “O1” tool steel showed cup–cone fracture mode, and “D2” tool steel showed a flat surface fracture mode. The dimple-like structures in scanning electron microscope (SEM) images revealed that both tool steels had a ductile fracture mode. View Full-Text
Keywords: fracture; cold work tool steel; AISI D2; AISI O1; high carbon steel fracture; cold work tool steel; AISI D2; AISI O1; high carbon steel
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Algarni, M. Mechanical Properties and Microstructure Characterization of AISI “D2” and “O1” Cold Work Tool Steels. Metals 2019, 9, 1169.

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