The effect of the local hardzone (LHZ) distributed in the coarse grained HAZ (CGHAZ) has been analyzed by 2-dimensional FEM on a mechanical model of the weld CGHAZ.
采用二维有限元数值方法分析了焊接热影响区粗晶区（CGHAZ）中局部硬化区（LHZ）的作用。
2
For CH joint, when the initial crack is located in hardzone, the closer the initial crack is to the hard soft interface, the slower the fatigue crack growth rate is.
起始裂纹在硬区的软对硬力学性能非对称焊接接头，起始裂纹越靠近软区，疲劳裂纹扩展速率越慢；
3
In a flood zone people and flooded villages are generally hard to reach, except slowly or by boat.