The effective methods to avoid the cracking include lowering strictly the content of impurity and adopting low temperature welding process.
有效的改进措施是严格控制杂质含量、将高温焊接工艺改为低温焊接工艺。
The results show that high content of impurity elements, segregation along grain boundaries and uneven grain size are main reasons for the surface damage of domestic tung...
结果显示，杂质元素的含量偏高和沿晶界的偏析以及不均匀的钨晶粒是造成国产钨靶表面损伤的主要原因。
The SMA plate with the high content of impurity have two-step fracture phenomenon, whose ultimate fracture strength is higher than the normal one, however, its plasticity is worse.
杂质含量高的板材出现两次断裂现象，其最终断裂强度比普通板材高，但塑性差；
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