但是铜在钢中极易在晶界富集，引起铜脆缺陷。
However, copper enrichment around grain boundaries in copper containing steel plate leads to a kind of defect called copper brittleness.
尤其是那一群绚烂的槭属植物——枫树——它们那发脆的、闪亮的叶子变成了深深的铜红色，在今天灿烂的秋日暖阳里熠熠闪烁。
In particular, a group of glorious acers - maples - whose crisp, shiny leaves have turned such a deep, coppery red that they are positively glowing in the glorious autumn sunshine today.
开裂主要原因为液相铜扩散进入奥氏体晶界引起晶界脆化，在应力作用下引起焊管开裂。
The main reason for cracking is liquid copper diffused into the austenite grain boundary and grain boundary embrittlement was caused, so the welded pipe cracked under stress.
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