The strengthening behavior of glass possessing permanentstress during ion exchange has been discussed.
本文讨论了具有淬冷应力的玻璃样品在离子交换过程中的增强行为。
2
As this toughened internal stress is a kind of permanentstress, it can not produce the internal stress attenuation with elongation of the product service time.
由于这种钢化内应力是一种永久应力,随着产品运行时间的延伸,它不会产生内应力衰减现象。
3
Instead, declining grades only predicted worse stress hormones among students who believed that worsening grades were a permanent and hopeless state of affairs.