A sealing device for insertion between a first and a second bearing part. The device including a rotating first shield, a stationary second shield, and an elastomeric sealing element having a first and a second sealing lip. The first shield includes a peripheral section having a first and a second axially extending sleeve portion connected by a first radially extending flange portion. The second shield including a support section for the lips, having an intermediate frustoconical portion that connects a second flange portion of the peripheral section to a mounting section of the second shield. The intermediate portion is positioned axially at a step formed by the first flange portion and by the first sleeve portion. The mounting section is arranged partially inside the second sleeve portion to form an axially directed labyrinth seal that is in metal-to-metal contact with the second bearing.

Machine and method for hot testing test pieces made of a thermoplastic polymer, in which the test pieces are immersed in a tank full of a heat transfer liquid which is heated; a fan generates, immediately above the tank, an air flow to carry away volatile substances emitted by the tank and the air flow is made to pass through a filtering cartridge housed removably inside a first chamber delimited by a casing, which is provided with an inlet opening, that faces towards the tank and is arranged flush with or immediately above an upper perimetral edge of the tank; the air flow is made to pass sequentially through at least three filtering elements, which are arranged hydraulically in series, including: a pre-filter; at least one activated carbon filter; and a HEPA filter; an hour counter signals when the time has come to replace the filtering cartridge.

Provided is a material performance testing system under a fixed multi-field coupling effect in a hypergravity environment, including a hoisted sealed cabin, a bearing frame, a high-temperature furnace, a mechanical test device, and a buffer device. The bearing frame and the high-temperature furnace are fixedly mounted inside the hoisted sealed cabin. The bearing frame is covered on the high-temperature furnace. The buffer device is mounted at a bottom of the high-temperature furnace. Upper and lower ends of the mechanical test device are connected in a top of the bearing frame and the bottom of the high-temperature furnace. A sample is connected and mounted at an end of the mechanical test device.

Disclosed is an equivalent acceleration method of creep loads based on a consistent failure mode. The equivalent acceleration method includes obtaining corresponding tensile strengths; obtaining corresponding creep rupture time; establishing rupture time law, minimum creep rate law and rupture strain law; calculating the value of parameter p in creep damage accumulation model; and dividing the failure mode consistency interval of creep load under variable temperature and variable load. The damage caused by the creep load in the failure mode consistency interval is calculated by using the multi-grade variable temperature and variable load creep nonlinear damage accumulation model, the damage is accelerated to the maximum creep load state in the failure mode consistency interval according to the principle of damage equivalence, and finally the equivalent acceleration of creep load is realized.

A process for analyzing a fracture or crack surface of a TiAl turbomachine part is provided. The process includes: marking on the surface the position and the orientation of cleavage facets, so as to identify a region of fracture or crack initiation and to determine the direction of propagation of this fracture or crack; examining the surface and detecting the regions with the presence of equiaxed grains and/or lamellar grains, so as to evaluate the temperature at which the fracture or crack has taken place, and comparing the heat tintings of the surface with those of samples from a heat tinting color chart so as to evaluate the speed of propagation of the fracture or crack.

A sub-micron scale property testing apparatus including a test subject holder and heating assembly. The assembly includes a holder base configured to couple with a sub-micron mechanical testing instrument and electro-mechanical transducer assembly. The assembly further includes a test subject stage coupled with the holder base. The test subject stage is thermally isolated from the holder base. The test subject stage includes a stage subject surface configured to receive a test subject, and a stage plate bracing the stage subject surface. The stage plate is under the stage subject surface. The test subject stage further includes a heating element adjacent to the stage subject surface, the heating element is configured to generate heat at the stage subject surface.

A specimen heating apparatus includes a heater unit configured to heat a test specimen held in a material testing machine, a heater holding unit configured to hold the heater unit in a set position relative to the test specimen for heating, a specimen temperature measurement unit attached to the heater unit and configured to measure temperature of the test specimen when the heater unit is in the set position, a temperature controller configured to control heating of the heater unit in response to a temperature measured by the specimen temperature measurement unit, and a thermal insulation unit configured to cover the heater unit, wherein the heater holding unit holds the heater unit in such a way that the heater unit is allowed to be brought to and removed from the set position while the test specimen is being held in the material testing machine.

Provided is an abrasion test apparatus for measuring an abrasion state of a workpiece, including: a workpiece holding mechanism holding the workpiece; a contact tool repeatedly making contact and non-contact with the workpiece; a rotating mechanism holding the contact tool to be freely rotatable; and a heating mechanism intermittently heating an end portion of the contact tool.

A method and apparatus for measuring corrosion damage in a sample while under a bending load at a desired temperature and pressure.

Provided is an integrated shape/property control method for hot power spinning of a cylindrical part based on a hot processing map. The method comprises: during the process of thermoplastic forming of a difficult-to-deform metal, performing a high-temperature mechanical property test on the metal material at a temperature and a strain rate range where dynamic recrystallization occurs; constructing, based on the power dissipation during the thermoplastic forming and a judging criterion for flow instability and on a flow stress-strain relation obtained from the high-temperature mechanical property test, power dissipation maps and flow instability maps at different strains, respectively; combining the power dissipation maps with the flow instability maps to obtain a hot processing map of the material; according to a profile of a power dissipation rate factor η and the flow instability criterion, obtaining potential dangerous forming conditions met with the flow instability criterion, and safe forming conditions under which the power dissipation rate factor η is large and the thermoplastic forming is facilitated; and finally performing hot power spinning of the cylindrical part at the temperature and strain rate that facilitates the thermoplastic forming of the material according to the hot processing map.