通过硬度、差示扫描量热法(DSC)及透射电镜分析,研究了自然时效及预时效的几种6000系合金人工时效析出行为.结果表明:在170℃人工时效初期,T4态(固溶淬火后室温放置两周)合金中GP区的溶解过程推迟了β"相的析出,所形成的析出物主要是β"核心,导致时效硬化性下降;而T4P态(固溶淬火后立即170℃人工时效不同时间,然后室温放置两周)合金在这一阶段β"核心连续长大成为β"相,其显微组织以β"析出物为主,导致时效硬化性增强.增加预时效时间,人工时效硬化效果更好.对Si过剩合金,增大Mg/Si质量比,有利于β"核心的析出,提高人工时效硬化性.
参考文献
| [1] | Miller W S;Zhuang L;Bottema J .Recent development in aluminium alloys for the automotive Industry[J].Materials Science and Engineering A:Structural Materials Properties Microstructure and Processing,2000,280:37-49. |
| [2] | Gupta A K;Bookbinder J B;Sang H S .Role of hardening solutes on the microstructure and strength of AA6111 automotive alloy[J].Materials Science Forum,2000,331-337:1297-1302. |
| [3] | Susumu Ikeno;Kenji Matsuda .Precipitation Sequence of Al-Mg-Si Alloys[J].Materials Science Forum,2003(Pt.1):357-362. |
| [4] | Kamat R G;Buffer J F;Murtha S J et al.Alloy 6022-T429 for autornotive sheet applications[J].Materials Science Forum,2002,396-402:1591-1596. |
| [5] | Burger G B;Gupta A K;Jeffroy P W .Microstmctural control of aluminum sheet used in automotlve applications[J].Materials Characterization,1995,35(01):23-39. |
| [6] | Busby A K;Edwards L;Marin J W .Effect of aging and dispersoid content on tensile properties of Al-0.6Mg-lSi al]oys[J].Journal of Materials Science and Technology,1986,2(04):363-367. |
| [7] | Kang S B;Zhen L;Kim H W .Effect of cold tolling and aging treatment on mechanical property and precipitation behavior[J].Materials Science Forum,1996,217-222:827-832. |
| [8] | S.Kleiner;Ch. Henkel;P.Schulz .Paint bake response of aluminium alloy 6016[J].Aluminium,2001(3):185-189. |
| [9] | Zhuang L;Jans J E;Smet P D.Natural ageing effect on the bake hardening responsein A1-Mg-Si alloys[J].Aluminium (TMS),2001:77-91. |
| [10] | Miao WF;Laughlin DE .Precipitation hardening in aluminum alloy 6022[J].Scripta materialia,1999(7):873-878. |
| [11] | Bryant D J .The effects of presaging treatments on aging kinetics and mechanical properties in AA6111 aluminum autobody sheet[J].Metallurgical and Materials Transactions A:Physical Metallurgy and Materials Science,1999,30(08):1999-2006. |
| [12] | Hidetoshi Uchida;Mineo Asano;Hideo Yoshida.Effect of second phase particles on the hendability of Al-Si alloy sheet[J].Aluminium (TMS),2002:57-63. |
| [13] | Miao WF.;Laughlin DE. .A differential scanning calorimetry study of aluminum alloy 6111 with different pre-aging treatments[J].Journal of Materials Science Letters,2000(3):201-203. |
| [14] | Zhen L;Kang S B .DSC auslyses of the precipitation behavior of two Al-Mg-Si alloys naturally aged for differest times[J].Materials Letters,1998,37(02):349-453. |
| [15] | Petovie A;Petovie D D;Weatherly G C .Precipitation in aluminum alloys AA6111 aud AA6016[J].Scripta Materialia,1999,41(07):703-708. |
| [16] | Yao J Y;Graham D A;Rinderer B et al.A TEM study of precipitation in AI-Mg-Si alloys[J].MICRON,2001,32(08):865-870. |
| [17] | Gupta A K;Lloyd K J;Court S A .Precipitation hardening processes in Al-0.4% Mg-1.3% Si-0.25 % Fe aluminum alloy[J].Materials Science and Engineering A:Structural Materials Properties Microstructure and Processing,2001,301(02):140-146. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%