Crack Formation of Fe-Cr-Al Alloy
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摘要: 應用聲發射及電鏡技術,研究了鐵鉻鋁合金在生產中裂紋的形成條件。
試驗表明:沿拉拔方向導致裂紋的形成其主要原因是氫致滯后破壞;碳化物在晶界附近析出可降低合金的塑性;此外,合金的脆性轉變溫度較高,熱應力也可以產生微裂紋。Abstract: Crack formation of Fe-Cr-Al alloy in wiredrawing process has been studied by means of acoustic emiassion and electron microscopy techniques.It is found that the major reason is due to Hydrogen-induced cracking in wiredrawing deriction. As Carbide precipitates at grain boundary, Ductility of alloy is low.In addition, brittleness tranoformation temperture of alloy is high, Crack may be induced by thermal stress. -
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