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What is Ultrasonic Hardness Testing

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The ultrasonic hardness tester is used for non-destructive hardness testing of materials. This inspection technique uses sound waves to evaluate the quality of solid materials , determine their thickness and detect the presence of internal defects. Advanced Ultrasonic Hardness Tester UCI 3000 applies ultrasonic contact impedance method to do comparative hardness measurement for testing pieces, with the high accuracy, efficiency, portability, and easy operation.

Time, Temperature and Transformation

There are three types of turret control, including a basic manual turret for changing from optics to in-dentation and back to optics for measuring. A second type incorporates an automatic turret, giving operators greater freedom to change the turret position by a button on the tester keypad. The most popular Vickers/Knoop hardness testers have a turret-control option that uses software to control the entire test with a one-click process using calibrated auto-edge detection. Precision video and measurement software also allows for clicking of the indent edges in software and then deriving a hardness reading on screen.

Hardness testing functionality has evolved, and now users can dial into world-class-caliber instrumentation that more closely aligns with their applications at hand. The method is based on the impacting the striker on the concrete surface with predetermined impacting energy and subsequent measuring of the height of the striker rebounding. The height of the striker rebounding will be proportional to the strength of concrete. The strength of concrete is determined with the calibration charts that are supplied with the instrument. Getting benefit from two types of measurements is the ultimate advantage that a portable device can provide.

AUH-II Portable Ultrasonic Hardness Tester

Automatic motorized test probe for the PCE-5000 hardness tester with a test force of 8N. The PCE-5000-STAND test stand for the PCE-5000 hardness tester is used to support the automatic test probes. The test stand allows automated measurements, with a higher reproducibility of tubes and round material.

The world’s first wireless Ultrasonic Contact Impedance testerEquotip Live UCI creates new opportunities for collaboration in portable ultrasonic hardness testing. In this paper, we present the development of a voluntary muscle contraction sensing system that provides motion information of body for computing human body forces for physical human–robot interactions . A resonance-based active-muscle stiffness sensor using piezoelectric probes was built and tested to measure stiffness changes in muscles. The sensor is evaluated by comparing the results with those of a force sensor and surface electromyography in terms of accuracy and by assessing the response time test under isometric conditions. Experimental results pertaining to flexor carpi radialis contractions are presented to show the feasibility and performance levels of the developed sensing system when sensing muscle contractions.

Rockwell A

The UCI hardness test is a superficial determination, only measuring the hardness condition of the surface contacted. The results generated at a specific location do not represent the part at any other surface location and yield no information about the material at subsurface locations. ASTM International is providing no-cost public access to important ASTM standards used in the production and testing of personal protective equipment. When using an Ultra Sonic Hardness tester, always test the equipment first before the operation. Learning the equipment, even though they are relatively easy to use, will help ensure accurate testing results.

Dolphin-nose systems allow for the hardness testing of inner, as well as exterior, diameters. The systems are generally larger in size than other bench Rockwell systems, offering greater testing heights and depths. Dolphin-nose models offer a manual handle that activates the preload system or an advanced auto z-axis preload system. Using the auto z-axis preload system, after placing the workpiece in testing position, the operator only needs to press the start button for the machine to complete the testing process. Can test non-destructive and handle small or thin work parts down to 2mm of thickness, as well as testing large parts.

One of the most common indentation hardness tests used today is the Rockwell hardness test. Although less widespread, the Brinell and Vickers hardness tests are also utilized. Most indentation hardness tests measure the deformation that occurs when the material being tested is penetrated with an indenter. Two levels of force are applied to the indenter at specified rates and dwell times when performing a Rockwell hardness test.

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