Measurement of elastic properties of AISI 52100 alloy steel by ultrasonic nondestructive methods

Abstract

In certain applications, it is important to measure the mechanical properties of steel with high accuracy. These measurements are usually performed by destructive processes, in which the test sample is destroyed. Destructive techniques cannot detect the minuscule changes made in the mechanical properties of steel during heat treatment processes. Ultrasonic nondestructive testing is an alternative method that can be used for measuring the mechanical properties of steel more precisely. In this paper, the ultrasonic method is used for measuring the elastic properties of AISI 52100 steel samples which are heat treated at different levels. Each sample has its specific microstructure and hardness due to the heat treatment process it has gone through. The elastic properties of each sample are obtained by measuring the velocities of longitudinal and shear waves in each sample. Comparison of the results obtained from ultrasonic measurements with those available in reference tables shows that the ultrasonic technique can measure the elastic properties of AISI 52100 samples with high accuracy. The ultrasonic technique also shows that it can identify the tempered martensite embrittlement zone in AISI 52100 samples.

Investigation of tungsten heavy alloys using powder metallurgy technique

“…Besides, Neua et al studied the replacement of WHA as an alternative solution as plasma-facing material. The obtained results confirmed that WHA provides a useful and costeffective alternative [6]. This research is one of the trials investigate the effect of graphene addition to WHA, hoping to improve the mechanical properties.…”

“…The achieved products also possess high quality and performance at a low manufacturing cost than other products of different materials families [3]. Besides, good resistant chemical and mechanical properties are obtained by different composite materials of polymer matrix [6,7]. There are two different points of view to classify composite materials.…”

“…However, polymers matrices PMCs are obtained from thermosetting or thermoplastic materials and put it in glass, carbon, steel, or Kevlar fibers as reinforced medium [5]. The second perspective class is based on the reinforcement features and geometry, such as laminate or particle and fibrous with random or preferred orientation [6]. In this investigation, a study was developed on tungsten heavy alloy WHA by adding graphene.…”

“…For example, EDMONDS and JONES studied the toughness of the two composite alloys of tungsten, nickel and iron and compare the results by tungsten, nickel and copper. They found that the value of results is depend on the cooling rate of sintering temperature, which influence the values of strength of the existence of tungsten particles in the matrix [5][6][7]. Gong et al investigated tensile, yield, and fracture strengths of three different WHAs.…”