ISSN: 1945-7553
CODEN: JTEVAB
Page Count: 10

An Evaluation of Dynamic Fracture Toughness of Type A508 Class 3 Steel

Fujii, E
Chief of Welding Mechanics Section, Ship Research Institute, Ministry of Transport, Mitaka, Tokyo,

Sakai, Y
Research Scientist, Yokohama National University, Yokohama,

Ando, Y
Emeritus Professor of University of Tokyo, Japan Engineering and Inspection Corporation, Tokyo,

Abstract

Using dynamic loading at a K rate range of 10² to 10⁵ MPa√m/s, fracture toughness tests were made on Type A508 Class 3 steel. Fatigue precracked 2T-type compact tension specimens were used. Tests were performed in accordance with Annex 7 of ASTM Test for Plane-Strain Fracture Toughness of Metallic Materials (E 399) using a high flow and high response tensile machine. In this investigation, load, strain, and displacement outputs were obtained with quite small oscillations. The results showed that dynamic fracture toughness values decreased with increasing test velocity and decreasing test temperature.

Keywords:
dynamic fracture toughness, rapid-load plane-strain fracture toughness KIc( ) testing, compact tension specimen, Type A508 Class 3 Steel, fast tensile machine

Paper ID: JTE11260J
DOI: 10.1520/JTE11260J
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