Within the piece with Mg and Si, for example sort scattered clutter. When introduced to the SHT 540 degrees for a period of 1 hour. Cause brake oil cusine with motion, thus making up a strength reduced.
The pieces are arranged Mg Si samples were scattered in disorder on the SHT at 540 degrees for 1 hour. The dislocation make the move so the strength decreased.
Within the target Mg and Si arrange sample scattered disorder when it SHT that 540 degrees for 1 hours makes this location there is movement. Therefore, the strength decreased.