A rig for testing thermomechanical loads comprises grip portions for gripping a test specimen, and a frame that join the grip portions to each other, the thermal expansion coefficient of the grip portions being greater than the thermal expansion coefficient of the frame. The frame may be made from metal.

A strength measurement system for rock specimen under microwave effect includes a supporting device, a testing cabin, a strength test device, a hydraulic loading device and a microwave transmitting device. Testing cabin is arranged on supporting device; strength test device is arranged in testing cabin, and a rock specimen is arranged on strength test device; a fixed end of hydraulic loading device is arranged on supporting device, and a movable end of hydraulic loading device acts on rock specimen; microwave transmitting device is arranged on testing cabin, and microwave transmitting device acts on rock specimen. Testing cabin has isolation function and limits microwave within testing cabin. By loading microwave on rock specimen by means of microwave transmitting device, effect of microwave on rock strength is learnt, and correlation between power and duration of microwave on rock specimen and rock strength is studied in targeted manner.

An apparatus for thermal ablation testing is provided. The apparatus comprises: a chamber; an optically transparent window in the chamber; a sample holder inside the chamber; a test sample in the sample holder; a number of bare-wire thermocouples connected to the test sample, wherein the thermocouples generate temperature data in the form of voltage; a mass balance inside the chamber, wherein the mass balance is configured to hold the sample holder and dynamically detect changes in mass of the test sample; an external radiant heat source configured to heat the test sample through the window; and a pyrometer directed at the test sample.

A device and method are provided for evaluating the susceptibility of hot cracking in an additive manufacturing process. A first end of a substrate is interconnected to a base and one of the base and a deposition device is moved in a first direction and the second end of the substrate is pulled. A powder is dispensed at a selected rate and an energy bean having an adjustable power density is direct at the powder to melt the powder to form a material which is deposited as a layer of a material on the substrate. During the deposition process or during the deposition of the material on a subsequent substrate, one or more parameters/conditions are varied to determine the point at which hot cracking occurs during the deposition process.