采用光学金相显微镜、扫描电镜、透射电镜、硬度测试、拉伸实验以及盲孔法测算残余应力等方法研究循环加载时效对Al-Cu铸造合金材料显微组织、力学性能及残余应力的影响.结果表明:淬火态Al-Cu铸造合金中存在较大的残余应力,在人工时效过程中可诱发θ'强化相的应力位向效应;而-40～80 MPa、83 Hz、40 min的循环加载处理可使峰值时效态Al-Cu铸造合金的残余应力降低到0.28σ0.2,其引起的微小塑性变形产生的大量位错组态诱发θ'相非均匀形核,提高了形核率,起到了细化析出相尺寸的作用,且抑制了θ'相析出的应力位向效应,从而提高了Al-Cu铸造合金材料的力学性能.
参考文献
| [1] | A.W.Zhu;J.Chen .Precipitation Strengthening of Stress-Aged Al-XCu Alloys[J].Acta materialia,2000(9):2239-2246. |
| [2] | Hargarter H.;Starke EA.;Lyttle MT. .Effects of preferentially aligned precipitates on plastic anisotropy in Al-Cu-Mg-Ag and Al-Cu alloys[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,1998(1):87-99. |
| [3] | ETO T;SATO A;MORI T .Stress-oriented precipitation of GP zones and θ' in an Al-Cu alloy[J].ACTA METALLURGICA,1978,26(03):499-508. |
| [4] | B. SKROTZKI;G.J. SHIFLET;E.A. STARKE JR. .On the Effect of Stress on Nucleation and Growth of Precipitates in an Al-Cu-Mg-Ag Alloy[J].Metallurgical and Materials Transactions, A. Physical Metallurgy and Materials Science,1996(11):3431-3444. |
| [5] | 王宏伟,易丹青,蔡金伶,王斌.应力时效对2E12铝合金的力学性能和微观组织的影响[J].中国有色金属学报,2011(12):3019-3025. |
| [6] | 曹素芳,潘清林,刘晓艳,陆智伦,何运斌,李文斌.外加应力对Al-Cu-Mg-Ag合金时效析出行为的影响[J].中国有色金属学报,2010(08):1513-1519. |
| [7] | 陈大钦,郑子樵,李世晨,陈志国,刘祖耀.外加应力对Al-Cu及Al-Cu-Mg-Ag合金析出相生长的影响[J].金属学报,2004(08):799-804. |
| [8] | 周亮,邓运来,晋坤,张新明.预处理对2124铝合金板材蠕变时效微结构与力学性能的影响[J].材料工程,2010(02):81-85,96. |
| [9] | A. W. ZHU and;E. A. STARKE;JR .STRESS AGING OF Al-Cu ALLOYS: COMPUTER MODELING[J].Acta materialia,2001(15):3063-3069. |
| [10] | ZHU A W;STARKE J E A .Stress aging of Al-Cu alloys:Experiments[J].Acta Materialia,2001,49(12):2285-2295. |
| [11] | D. Rao;D. Wang;L. Chen .The effectiveness evaluation of 314L stainless steel vibratory stress relief by dynamic stress[J].International Journal of Fatigue,2007(1):192-196. |
| [12] | M.C. Sun;Y.H. Sun;R.K. Wang .Vibratory stress relieving of welded sheet steels of low alloy high strength steel[J].Materials Letters,2004(7/8):1396-1399. |
| [13] | Jijin Xu;Ligong Chen;Chunzhen Ni .Effect of vibratory weld conditioning on the residual stresses and distortion in multipass girth-butt welded pipes[J].International Journal of Pressure Vessels and Piping,2007(5):298-303. |
| [14] | SUN M C;SUN Y H;WANG R K .The vibratory stress relief of a marine shafting of 35# bar steel[J].Materials Letters,2004,58(03):299-303. |
| [15] | 沈华龙,吴运新,郭俊康.高强度铝合金厚板振动时效工艺的研究[J].振动与冲击,2009(08):191-194. |
| [16] | 沈华龙,吴运新,熊卫民.振动时效应用于铝合金时动应力的选择[J].材料工程,2009(04):18-22. |
| [17] | 王松涛,赵忠兴,田庆海,毕泗元.ZL205A合金热处理工艺研究[J].热加工工艺,2005(05):39-40,42. |
| [18] | Mi Guofa,Wang Kuangfei,Gong Haijun,Wang Hongwei,Zeng Songyan.Microstructure and properties of ZL205 alloy[J].中国铸造,2008(01):24-27. |
| [19] | 赵建华,陈泽宇,李思宇,杨金龙,邓运来.初始状态对2124铝合金蠕变时效行为与力学性能的影响[J].材料工程,2012(10):63-67,72. |
| [20] | 邓运来,周亮,晋坤,张新明.2124铝合金蠕变时效的微结构与性能[J].中国有色金属学报,2010(11):2106-2111. |
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%