SEDL / STP / STP1172-EB / STP24708S

Applicability of the Short Rod Fracture Toughness Test to New Microalloyed Bar Steels

Tschanz, TC
metallurgical engineer, Metallurgical Services of Kentucky,

Matlock, DK
Professor, Advanced Steel Processing and Products Research CenterColorado School of Mines, Golden, CO

Krauss, G
Professor, Advanced Steel Processing and Products Research CenterColorado School of Mines, Golden, CO

Pages: 17    Published: Jan 1992

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Abstract

The applicability of the short rod fracture toughness test to fracture analyses of new microalloyed bar steels, under consideration as substitutes for quenched and tempered steels, is evaluated. Data on two bainitic steels processed with microstructures of ferrite and austenite in which the austenite transforms to martensite with strain are compared to data on 4140 steel and 1045V steel. The applicability of the short rod fracture toughness test is discussed in conjunction with an analysis of the unique deformation behaviors of the four steels. Alterations to the test criteria for materials with microstructures which change with strain are suggested.