Abstract
The high-temperature hardness test has a wide range of applications, but lacks test standards. The purpose of this study is to develop a finite element method (FEM) model of the relationship between the high-temperature hardness and high-temperature, quasi-static compression experiment, which is a mature test technology with test standards. A high-temperature, quasi-static compression test and a high-temperature hardness test were carried out. The relationship between the high-temperature, quasi-static compression test results and the high-temperature hardness test results was built by the development of a high-temperature indentation finite element (FE) simulation. The simulated and experimental results of high-temperature hardness have been compared, verifying the accuracy of the high-temperature indentation FE simulation.The simulated results show that the high temperature hardness basically does not change with the change of load when the pile-up of material during indentation is ignored. The simulated and experimental results show that the decrease in hardness and thermal softening are consistent. The strain and stress of indentation were analyzed from the simulated contour. It was found that the strain increases with the increase of the test temperature, and the stress decreases with the increase of the test temperature.
Highlights
A hardness test is an accurate, simple, and non-destructive measurement of the mechanical properties of material
The high-temperature hardness test method has been widely used on a variety of materials, such as metal [8,9,10], ceramics [11], and polymer material [12]
4.68%, and the maximum relative error is less than 8%
Summary
A hardness test is an accurate, simple, and non-destructive measurement of the mechanical properties of material. The indentation hardness test is the primary method. The size of the impression left after a hard indenter is pressed into the surface is measured to evaluate material hardness. The indentation hardness test method could be used to acquire high-temperature hardness. The high-temperature hardness test method has been widely used on a variety of materials, such as metal [8,9,10], ceramics [11], and polymer material [12]. The object of the high-temperature hardness test may be the matrix [13] or coating [14]
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