中国有色金属学报（英文版）
中國有色金屬學報（英文版）
중국유색금속학보（영문판）
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
2012年
4期
803-809
,共7页
彭国胜%陈康华%陈送义%方华婵
彭國勝%陳康華%陳送義%方華嬋
팽국성%진강화%진송의%방화선
铝合金%回归再时效(RRA)%微观组织%拉伸性能%剥落腐蚀
鋁閤金%迴歸再時效(RRA)%微觀組織%拉伸性能%剝落腐蝕
려합금%회귀재시효(RRA)%미관조직%랍신성능%박락부식
aluminum alloy%retrogression and re-aging%microstructure%tensile properties%exfoliation corrosion
采用硬度、拉伸和剥落腐蚀测试手段,结合透射电镜和扫描电镜观察以及能谱分析,研究二次回归再时效对组织、力学和剥蚀性能的影响.二次回归再时效处理保持了类似一次回归再时效处理的晶内析出相,得到比T76过时效更粗大且离散的晶界析出相.与T76相比,二次回归再时效处理的晶界析出相具有更高的铜含量和更低的锌含量.因此,二次回归再时效处理保持了一次回归再时效处理的强度,同时得到了比T76过时效处理更高的剥蚀抗力.
採用硬度、拉伸和剝落腐蝕測試手段,結閤透射電鏡和掃描電鏡觀察以及能譜分析,研究二次迴歸再時效對組織、力學和剝蝕性能的影響.二次迴歸再時效處理保持瞭類似一次迴歸再時效處理的晶內析齣相,得到比T76過時效更粗大且離散的晶界析齣相.與T76相比,二次迴歸再時效處理的晶界析齣相具有更高的銅含量和更低的鋅含量.因此,二次迴歸再時效處理保持瞭一次迴歸再時效處理的彊度,同時得到瞭比T76過時效處理更高的剝蝕抗力.
채용경도、랍신화박락부식측시수단,결합투사전경화소묘전경관찰이급능보분석,연구이차회귀재시효대조직、역학화박식성능적영향.이차회귀재시효처리보지료유사일차회귀재시효처리적정내석출상,득도비T76과시효경조대차리산적정계석출상.여T76상비,이차회귀재시효처리적정계석출상구유경고적동함량화경저적자함량.인차,이차회귀재시효처리보지료일차회귀재시효처리적강도,동시득도료비T76과시효처리경고적박식항력.
Influence of dual retrogression and re-aging (dual-RRA) temper on microstructure,strength and exfoliation corrosion (EC) behavior of Al-Zn-Mg-Cu alloy was investigated by hardness measurements,tensile properties tests,exfoliation corrosion tests,transmission electron microscopy (TEM) and scanning electron microscopy (SEM) observation combined energy dispersive X-ray detector (EDX) analysis.Dual-RRA temper maintains the matrix precipitates (MPs) similar to RRA temper,meanwhile obtains coarser and sparser grain boundary precipitates (GBPs) as well as higher Cu and lower Zn content compared with T76 temper.Therefore,dual-RRA temper not only keeps strength equivalent to the RRA temper but also obtains higher EC resistance than T76 temper.
