Vol.28 No.7 蔡元华等：过饱和A一Z一MgC一Mn合金热分解的XRD研究 ·653。 类型的含锰相. high strength Al-Zr-Mg-Cu Py M alloys.Mater Sci Forum. 2)固溶体高温分解时，因铝基体中固溶大量 1996.217-222:1823 [5]Osamura K.Kohno K.Okuda H,et al.Mesoscopic structure of 的合金化元素，从而处于能量极高的热力学不稳 superhigh strength P/M AHZn-Mg-Cu albys.Mater Sci 定状态，热力学上稳定的Al6Mn相直接从过饱和 Forum,1996,217-222:1829 的铝合金固溶体中析出，而不是先析出含锰的亚 [6 Chang J.Moon I Choi C.Evolution of microstructure and 稳过渡相 tensile strength of rapidy solidified Al-4 7%Z2 5%Mg 0 2%Zx%Mn alloys.Metall Mater Trans.1998.A 29: 参考文献 1873 [1]Mathy J.Scharf G.Becker J.et al.Development of high [7 Lim S G,Jung Y S.and Kim SS.Characteristics of rapidly strength pow der metallurgical aluminum alloys Metallurgy. solidi fied Al7075-x%Mn albys.Scripta Mater.2000. 43:1077 1990.44:532 [2]Lim S G.Sunamat M,Kameko J.Age hardening and mechan- [8 Adachi H.Osamura K.Ochiai S,et al.Mechanical pmoperty ical properties of rapidly solidified A9%Z25%Mg-1%Cu of nanoscale precipitate handering aluminum alloys Scripta albys containing transition metak.J Jpn Inst Light Met. Mter.2001.44:1489 1991.41:440 [9 Ohashi T.DaiL.Fukatsu N.Decomposition characteristics of [3]Park D S,Nam S W.Effects of manganese dispersoid on the AHMZr alloys mapidy-qenched fmom melt.Metall Trans, mechanical properties in Al-Zn-Mg aloys.J Mater Sci. 1986.A17:799 1995.30:1313 【10郑来苏.铸造合金及其熔炼.西安：西北工业大学出版社， [4]KusuiJ.Yokte T,Osamum K.et al.Devdopment of super 1994:57 XRD study of the decomposition of a supersaturated Al Zn Mg Cu Mn alloy CAI Yuanhua,CHENG Junsheng,HAO Bin,YANG Bin,ZHANG Jishan State Key Laboratory for Advanced Metals and Materials,University of Science and Technology Beijng.Beijng 100083.China ABSTRACT Supersaturated AlZnMg Cu Mn alloy powder w as m ade using the spray and high energy ball milling method,and XRD was used to investigate the decom position process of the supersat urated al- loy.The results show ed that the balanced phase precipitated from the supersaturated alloy was n phase (MgZn)when the decomposition temperature was below 350C,and no balance or metastable phases con- taining manganese were detected by the XRD method.When the decomposition temperature was 350Cfor a long time,or above 350C there were two phases precipitated from the supersaturated alloy.One was the balanced n phase(MgZn2),and the other was Al6M n,which was directly precipitated from the alloy, but not transformed from any metastable phase of manganese. KEY WORDS aluminum alloy;manganese;supersaturated;decomposition;XRD类型的含锰相. 2) 固溶体高温分解时, 因铝基体中固溶大量 的合金化元素, 从而处于能量极高的热力学不稳 定状态, 热力学上稳定的 Al6Mn 相直接从过饱和 的铝合金固溶体中析出, 而不是先析出含锰的亚 稳过渡相 . 参 考 文 献 [ 1] Mathy J, Scharf G, Becker J, et al.Development of high strength pow der metallurgical aluminum alloys.Metallurgy, 1990, 44:532 [ 2] Lim S G, Sunamat M, Kaneko J.Age hardening and m echan￾ical properties of rapidly solidified Al-9%Zn-25%Mg-1%Cu alloys cont aining transition metals.J Jpn Inst Light Met, 1991, 41:440 [ 3] Park D S, Nam S W .Effects of manganese dispersoid on the mechanical properties in Al -Zn -Mg alloys.J Mater Sci, 1995, 30:1313 [ 4] Kusui J, Yokt e T, Osamu ra K, et al.Development of super￾high strength Al-Zn-Mg-Cu P/ M alloys.Mater Sci Forum, 1996, 217-222:1823 [ 5] Osamura K, Kohno K, Okuda H, et al.Mesoscopic structure of super-high strength P/ M Al-Zn-Mg-Cu alloys.Mater Sci Forum, 1996, 217-222:1829 [ 6] Chang J, Moon I, Choi C .Evolution of microstructure and tensile strength of rapidly solidified Al-4.7%Zn-2.5%Mg- 0.2%Zr-x % Mn alloys.Metall Mater Trans, 1998, A 29: 1873 [ 7] Lim S G, Jung Y S, and Kim S S .Characteristics of rapidly solidified Al-7075-x % M n alloys.Scripta Mater, 2000, 43:1077 [ 8] Adachi H, Osamura K, Ochiai S, et al.Mechanical propert y of nanoscale precipit ate hardening aluminum alloys.Scripta Mater, 2001, 44:1489 [ 9] Ohashi T, Dai L, Fukatsu N .Decomposition characteristics of Al-Mn-Zr alloys rapidly-quenched from melt .Metall Trans, 1986, A17:799 [ 10] 郑来苏.铸造合金及其熔炼.西安:西北工业大学出版社, 1994:57 XRD study of the decomposition of a supersaturated Al-Zn-Mg-Cu-Mn alloy CAI Y uanhua, CHENG Junsheng, HAO Bin, Y ANG Bin, ZHANG Jishan S tate Key Laboratory for Advanced Met als and Materials, Universit y of Science and Technology Beijing, Beijing 100083, China ABSTRACT Supersaturated Al-Zn-Mg-Cu-M n alloy powder w as made using the spray and hig h energy ball milling method, and XRD was used to investigate the decomposition process of the supersaturated al￾loy .The results show ed that the balanced phase precipitated from the supersaturated alloy w as ηphase ( MgZn2) w hen the decomposition temperature w as below 350 ℃, and no balance or metastable phases con￾taining manganese were detected by the XRD method .When the decomposition temperature w as 350 ℃for a long time, or above 350 ℃, there w ere two phases precipitated from the supersaturated alloy .One was the balanced ηphase( M gZn2) , and the other w as Al6M n, w hich w as directly precipitated from the alloy, but no t transformed from any metastable phase of manganese . KEY WORDS aluminum alloy ;mang anese ;supersaturated ;decomposition ;XRD Vol.28 No.7 蔡元华等:过饱和 Al-Zn-Mg-Cu-Mn 合金热分解的 XRD 研究 · 653 ·