Evaluation of high-temperature tensile properties of Ti-6Al-4V using instrumented indentation testing

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• 作者：Junyeong Kim ; Kug-Hwan Kim ; Dongil Kwon
• 关键词：indentation ; strength ; tensile test ; Ti ; 6Al ; 4V ; high temperature
• 刊名：Metals and Materials International
• 出版年：2016
• 出版时间：March 2016
• 年：2016
• 卷：22
• 期：2
• 页码：209-215
• 全文大小：550 KB
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• 作者单位：Junyeong Kim (1)
  Kug-Hwan Kim (1)
  Dongil Kwon (1)
  
  1. Department of Materials Science & Engineering, Seoul National University, Seoul, 08826, Korea
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Metallic Materials
  Operating Procedures and Materials Treatment
  
• 出版者：The Korean Institute of Metals and Materials, co-published with Springer Netherlands
• ISSN：2005-4149

文摘

Since materials used in or exposed to high-temperature environments can undergo variation or degradation of mechanical properties, it is important to evaluate mechanical properties at high temperature, in particular for structural applications and aerospace materials. Instrumented indentation testing (IIT) is widely used to evaluate such mechanical properties of materials as tensile properties, residual stress, fracture toughness, etc., exploiting theoretical approaches to indentation mechanics. In this study, we used IIT to evaluate variations in tensile properties with temperature of the Ti alloy Ti-6Al-4V, a candidate material for aerospace applications, using a high-temperature chamber and a modified representation method. Comparison of our results with conventional uniaxial tensile test results showed good agreement (within a 10% error range) in yield strength and ultimate tensile strength. This confirms the potential of IIT for evaluating to evaluate high-temperature tensile properties of metallic materials and for research on material behavior in various temperature conditions.