研究了高温预析出对7A52合金组织、时效硬化和应力腐蚀断裂的影响.结果表明:高温预析出处理在保持7A52合金强度、塑性的同时,可提高合金抗应力腐蚀性能.480℃固溶处理条件下,经过预析出处理后,合金应力腐蚀开裂界限应力强度因子KISCC由7.6 MPa.m1/2提高至9.1 MPa.m1/2,475℃固溶处理条件下,经过预析出处理后,KISCC由8.9 MPa.m1/2提高至11.1 MPa.m1/2;未经预析出处理的7A52合金应力腐蚀断裂区发生严重的阳极溶解腐蚀,晶界和亚晶界均发生断裂,经高温预析出处理后,应力腐蚀裂纹仅沿平行晶界扩展;高温预析出处理使晶界析出相粗化显著、离散度增大且晶界析出相Cu含量提高,这是合金抗应力腐蚀性能得到显著改善的重要原因.
参考文献
[1] | 林肇琦;孙贵经;陈长治 .[J].东北工学院学报,1980,3:22. |
[2] | Heinz A;Haszler A .[J].Materials Science and Engineering,2000,A280:102. |
[3] | LI Song;CHEN Kang-hua;LIU Hong-wei;HUANG Lan-ping;ZHANG Zhuo .Effect of high-temperature pre-precipitation on mechanical properties and stress corrosion cracking of Al-Zn-Mg alloys[J].Transactions of Nonferrous Metals Society of China,2003(3):585-589. |
[4] | CHEN Kang-hua;HUANG Lan-ping .Strengthening-toughening of 7xxx series high strength aluminum alloys by heat treatment[J].Transactions of Nonferrous Metals Society of China,2003(3):484-490. |
[5] | CHEN Kang-hua;HUANG Lan-ping .Effect of high-temperature pre-precipitation on microstructure and properties of 7055 aluminum alloy[J].Transactions of Nonferrous Metals Society of China,2003(4):750-754. |
[6] | Bigot A;Danoix F;Auger P et al.[J].Materials Science Forum,1996,217-222:695. |
[7] | Schmuck C.;Danoix F.;Blavette D.;Auger P. .QUANTITATIVE ANALYSIS OF GP ZONES FORMED AT ROOM TEMPERATURE IN A 7150 AL-BASED ALLOY[J].Applied Surface Science: A Journal Devoted to the Properties of Interfaces in Relation to the Synthesis and Behaviour of Materials,1995(1/4):228-233. |
[8] | Park J K;Ardell A J .[J].METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE,1983,14:1957. |
[9] | Lendvai J;Honyek G;Kovács I .[J].Scripta Metall,1979,13:593. |
[10] | Mukhopahyay A K;Yang Q B;Singh S R .[J].ACTA MATERIALIA,1994,4(09):3038. |
[11] | 刘玲霞,王来生,赵腾,张存信.热处理对705铝合金板应力腐蚀性能的影响[J].包头钢铁学院学报,2000(03):230-233. |
[12] | Najjar D;Magnin T;Warner T J .[J].Materials Science and Engineering A:Structural Materials Properties Microstructure and Processing,1997,238(02):293. |
[13] | 宋仁国;张宝金;曾梅光 et al.[J].金属学报,1997,33(06):595. |
[14] | 王祝堂;田荣璋.铝合金及其加工手册[M].长沙:中南大学出版社,2000:132. |
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