The line-shaped approximate function technique is used for macro-stress measurement, whereas the line-shaped mass core technique for micro-stress measurement.
微观内应力测量采用了线形近似函数法，宏观内应力测量采用了线形质心法。
2
However, stepped aging, which relaxes internal macro-stress under lower temperature then ages under higher temperature, can avoid longitudinal cracks effectively.
分级时效处理，低温下先让合金内部的宏观应力松弛，再在较高温度下时效，可有效地避免棒材纵向开裂。
3
Considering the effect of heating rate and thermo-softening of material, the redistribution of macro-stress and deformation in structures and the possible heat inducing motion are discussed.