本文選題：鋁合金 + 時(shí)效　； 參考：《中國(guó)有色金屬學(xué)報(bào)》2015年02期

【摘要】：通過(guò)晶間腐蝕(IGC)、剝落腐蝕(EXCO)實(shí)驗(yàn)及透射電鏡(TEM)和掃描電鏡(SEM)分析,研究Zn元素及時(shí)效工藝對(duì)2056鋁合金抗晶間腐蝕性能和抗剝落腐蝕性能的影響。結(jié)果表明:2056鋁合金在T6(175℃)時(shí)效態(tài)下,隨著時(shí)效時(shí)間的延長(zhǎng),其晶間腐蝕與剝落腐蝕敏感性逐漸降低;在T8(155℃)峰時(shí)效態(tài)和T3(室溫)時(shí)效態(tài)下,合金的抗晶間腐蝕及抗剝落腐蝕性能均有所提高,且在T3態(tài)下2056鋁合金的抗腐蝕性能最好;在T6峰時(shí)效態(tài)下,不添加Zn的2056鋁合金比添加Zn的2056合金的抗腐蝕性能差。合金發(fā)生局部腐蝕與晶界及其附近區(qū)域的特征緊密相關(guān),當(dāng)晶界析出相(S(S′)相)呈鏈狀分布且晶界無(wú)沉淀析出帶(PFZ)較寬時(shí),合金晶間及剝落腐蝕敏感性大;晶界析出相尺寸越大,分布越不連續(xù),PFZ越窄,合金晶間及剝落腐蝕敏感性越小;當(dāng)晶界無(wú)析出相和PFZ時(shí),合金晶間及剝落腐蝕敏感性最小。
[Abstract]:The effects of Zn element and aging process on intergranular corrosion resistance and peeling corrosion resistance of 2056 aluminum alloy were studied by means of intergranular corrosion (IGC), exfoliation corrosion (EXCO), transmission electron microscopy (TEM) and scanning electron microscopy (SEM). The results show that the susceptibility to intergranular corrosion and exfoliation corrosion decreases with the aging time of T6 (175 鈩，

本文編號(hào)：2104057