Abstract: A microscope device for observing a sample. The microscope device and the sample are located on an optical route. The microscope device includes an objective lens unit and an additional light source set. The light source set includes a circuit substrate, a battery and a light-emitting unit. The circuit substrate has a power source portion and a light source portion electrically connected to the power source portion. A connecting member and the battery are arranged at opposite sides of the power source portion. The light-emitting unit is arranged on the light source portion, and the distance between the light-emitting unit and the center axis of the optical route is greater than the radius of the objective lens unit. The battery activates the light-emitting unit to generate a light beam, and the light beam irradiates toward the center axis of the optical route.

Abstract: An aluminum alloy powder for laser laminated manufacturing includes Si: 2.0-4.5 wt %; Mg: 0.1-1.3 wt %; Fe: 0.07-0.65 wt %; Cu: 0.35 wt % or less; Cr: 0.02-0.32 wt %; Zn: 0.23 wt % or less; Ti: 0.23 wt % or less; Mn: 0.13 wt % or less; and the rest is aluminum. The aluminum alloy powder further includes inevitable impurities.

Abstract: An aluminum alloy wheel for a vehicle is provided, which includes: a wheel central portion, a rim portion, and a plurality of radial elements, wherein the aluminum alloy wheel is processed by centrifugal casting and forging to form a central portion with a morphology exhibiting a grain size variation with decreasing gradient in a lateral direction from an inner side of the wheel central portion to an outer side thereof.

Abstract: An aluminum alloy wheel for a vehicle is provided, which includes: a wheel central portion, a rim portion, and a plurality of radial elements, wherein the aluminum alloy wheel is processed by centrifugal casting and forging to form a central portion with a morphology exhibiting a grain size variation with decreasing gradient in a lateral direction from an inner side of the wheel central portion to an outer side thereof.