under the action of a same heat source, when the direction of grain is perpendicular to the direction of the action, the ignition delay time is the longest.
同样外部热源作用下,木材内部木纹方向垂直于作用方向时,着火延迟时间最长;
from the center to the edge of the sample, in the nd direction, (001) the direction of grain decreased;
由中心到边缘,在样品nd方向,(001)方向晶粒逐渐减少;
along the radial direction, from the inside to the outside, in the sample of nddirection, the direction of grain decreased (010).
沿径向方向看,从里至外,在样品nd方向,(010)方向晶粒逐渐减少。