采用热力模拟试验方法进行热压缩变形试验,研究了一种新型Al-Zn-Mg-Cu合金在变形温度为300～450℃,应变速率为0.001～1s-1,压缩变形程度为50%条件下的流变应力行为.结果表明,变形温度和应变速率对合金流变应力的大小影响显著,流变应力随变形温度的升高而降低,随应变速率的提高而增大.采用统计回归方法建立了该合金的热压缩变形流变应力本构方程,其热变形激活能Q=169.92kJ/mol.
参考文献
| [1] | 王洪,付高峰,孙继红,李兴杰,姜澜.超高强铝合金研究进展[J].材料导报,2006(02):58-60. |
| [2] | William Cassada;John Liu;James Staley .ALUMINUM ALLOYS FOR AIRCRAFT STRUCTURES[J].Advanced Materials & Processes,2002(12):27-29. |
| [3] | POIRIER J P;关德林.晶体的高温塑性变形[M].大连:大连理工大学出版社,1989 |
| [4] | 李俊鹏,沈健,许小静,闫晓东,毛柏平.7050高强铝合金高温塑性变形的流变应力研究[J].稀有金属,2009(03):318-322. |
| [5] | PUCHI E S;STAIA M H .High-temperature deformation of commercial-purity aluminum[J].Metall Mater Trans(A),1998,29(09):2345. |
| [6] | 王亮,李惠曲,陈慧琴,刘建生.Al-Zn-Mg-Cu合金热压缩流变应力行为及组织演变[J].锻压技术,2010(04):133-136. |
| [7] | S. Serajzadeh .Modelling flow stress behaviour of aluminium alloys during hot rolling[J].Materials Science and Technology: MST: A publication of the Institute of Metals,2006(6):713-718. |
| [8] | 李杰,尹志民,黄继武,王涛.超高强Al-Zn-Mg-Cu-Zr合金的热变形行为[J].稀有金属,2004(01):166-170. |
| [9] | DAVENPOT S B;SILK N J;SPARKS C N et al.Development of constitutive equations for modeling of hot rolling[J].Materials Science and Technology,2000,16(05):539-542. |
| [10] | Sheppard T;Jackson A .Constitutive equations for use in prediction of flow stress during extrusion of aluminium alloys[J].Materials Science and Technology: MST: A publication of the Institute of Metals,1997(3):203-209. |
| [11] | SELLARS C M .On the mechanism of hot deformation[J].Acta Metallurgica,1966,14:1136-1138. |
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%