THE VISION OF FRACTURE TOUGHNESS ASSESSMENT OF STRUCTURAL MATERIALS FOR QUALITY CONTROL AT THE MANUFACTURING STAGE | ||||
| The International Conference on Applied Mechanics and Mechanical Engineering | ||||
| Article 139, Volume 13, 13th International Conference on Applied Mechanics and Mechanical Engineering., May 2008, Page 1-13 PDF (501.5 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/amme.2008.39810 | ||||
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| Author | ||||
| RAY K. K. | ||||
| Professor, Department of Metallurgical and Materials Engineering, Indian Institute of Technology, Kharagpur, India. | ||||
| Abstract | ||||
| ABSTRACT Methods to determine fracture toughness of structural materials as documented in ASTM standard E-1820 are neither appropriate for quality control of tonnage materials at the stage of production due to techno-economic reasons nor are suitable for material development owing to their time-consuming nature. This report aims to suggest a common solution to these problems considering measurement of fracture toughness (KIVM) using chevron notched bend bar specimens with either rectangular cross-section (RC) or circular cross-section (CC). The theoretical background for obtaining KIVMRC and KIVMCC and the corresponding normalized stress intensity factors are first discussed in this report. The usefulness of this technique is next illustrated using a number of examples related to the examinations of the (a) effect of inclusions on toughness characteristics of microalloyed steels, (b) optimization of the volume fraction of the constituent phases in dual phase steels, (c) design of heat treatment for cast rolls and (d) designing small specimens for fracture toughness determination. | ||||
| Keywords | ||||
| Fracture Toughness; Chevron notched specimen; Microalloyed steel; Dual phase steel; Small specimen | ||||
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