Abstract
High carbon steel (AISI 1065) and stainless steel (AISI 304) are high strength materials that are mostly used as wear resistance materials because of there high hardness and toughness. These two materials are widely used for applications in which high strength, hardness and wear resistance are required, these requirement are fund in cutting tools, springs and surgical instruments. Nevertheless, the presence of notch in these materials do affect their service life. This paper reports on the characteristics of notched high carbon steel and stainless steel materials investigated under tensile, torsion and impact loads. The behaviour of the materials were examined under different notch parameters of angle 30°, 45° and 60° and notch base radius of 0.5 mm and 1.0 mm. The tensile, torsion and impact test samples were prepared according to ASTM E8M, ASTM F383-15 and ASTM E23-16b respectively. Examination on the tensile and torsion tests were carried out on Testometric Universal Testing Machine (TUTM), while Avery-Denison Izod impact testing machine was used for impact test. The results obtained for the two materials showed that there is increase in absorption energy and resistance to twisting failure as notch tip radius and notch angle increase.
Highlights
1 INTRODUCTION High carbon (AISI 1065) and stainless steels (AISI 304) are two types of materials widely used for applications in which high strength, hardness and wear resistance are required in tools steel, dies, cutting tools, springs in manufacturing and automobile industries as well as surgical instruments in medical industries [1,2,3]
The recorded values of yield strength and ultimate tensile strength for the three notch angles (30o, 45o and 60o) is higher for 0.5 mm notch radius than the values obtained for 1.0 mm notch radius
The result of the UTS for the high carbon steel (HCS) (Table 3) follows the same trend with the result obtained for the yield strength, with the highest ultimate tensile strength of 1622.107 N/mm2 recorded for 0.5 mm notch radius placed at 45o on the sample
Summary
High carbon (AISI 1065) and stainless steels (AISI 304) are two types of materials widely used for applications in which high strength, hardness and wear resistance are required in tools steel, dies, cutting tools, springs in manufacturing and automobile industries as well as surgical instruments in medical industries [1,2,3]. The performance of these material during their service life depends on inherent properties of the materials, loading system, maintenance culture and environmental effects. Stress developed by notch of any form do influence the behaviour of materials and the study of notch properties of materials provides information regarding the effects of stress concentrations of varying magnitude which helps to understanding how stresses influence material performance under service [10,11]
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