通过引入与Batra及Kim类似的观点,将绝热剪切带宽度定义为绝热剪切带的中心区域的宽度(W5%),在该区域上温度比其峰值小5%,利用Johnson-cook模型及梯度塑性理论分析Ti-6A1-4V绝热剪切带的厚度随环境温度的演变规律.计算表明,随着环境温度的升高,绝热剪切带宽度增加,这与许多实验观测结果一致.当绝热剪切带的总厚度在上限时,绝热剪切带宽度-环境温度曲线是稍微上凹的;但是,当绝热剪切带的总厚度在下限时,绝热剪切带宽度-环境温度曲线基本上是直线,著名的Dodd及Bai模型无法预测这些新现象.关于绝热剪切带宽度的计算结果非常接近于Liao及Duffy的实测结果.在忽略应变硬化的条件下,采用线性软化模型及梯度塑性理论推导w5%的简化解析式,发现环境温度、密度、热容、软化模量、剪切应力的增加使绝热剪切的敏感性降低,而功热转化因子及抗剪强度的降低使绝热剪切的敏感性降低.
参考文献
| [1] | 胡文英,邓炬,谢丽英.Ti-15-3合金薄靶板弹坑断口特征及绝热剪切破坏[J].稀有金属材料与工程,1993(03):38-42. |
| [2] | 陈军;赵永庆;杨海瑛 .[J].材料热处理学报,2006,35(22):17. |
| [3] | Liao SC.;Duffy J. .Adiabatic smear bands in a Ti-6Al-4V titanium alloy[J].Journal of the Mechanics and Physics of Solids,1998(11):2201-2231. |
| [4] | 孙坤,王富耻,程兴旺,苗普,赵双赞.TC6钛合金绝热剪切带不同发展阶段的精细结构[J].稀有金属材料与工程,2009(02):233-236. |
| [5] | 包合胜;王礼立;卢维娴 .[J].爆炸与冲击,1989,9(02):109. |
| [6] | 李鑫,鲁世强,王克鲁,丁林海,李臻熙,曹春晓.基于Murty准则粗片层TC11合金两相区的热态变形行为[J].中国有色金属学报,2008(08):1407-1413. |
| [7] | Lee WS;Lin CF;Chen TH;Hwang HH .Correlation of dynamic impact properties with adiabatic shear banding behaviour in Ti-15Mo-5Zr-3Al alloy[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2008(1/2):172-184. |
| [8] | Seshacharyulu T;Medeiros S C;Frazier W G et al.[J].Materials Science and Engineering A:Structural Materials Properties Microstructure and Processing,2000,A 284(1-2):184. |
| [9] | 王学滨.Ti-6Al-4V绝热剪切带的厚度及应变率效应研究[J].稀有金属材料与工程,2009(02):214-218. |
| [10] | Wang X B .[J].Solid State Phenomena,2008,138:385. |
| [11] | Wang X B .[J].Journal of Mechanics of Materials and Structures,2010,5(01):95. |
| [12] | Wang X B .[J].Transactions of Nonferrous Metals Society of China,2006,16(02):333. |
| [13] | Wang X B .[J].Transactions of Nonferrous Metals Society of China,2006,16(06):1362. |
| [14] | Wang X B .[J].Transactions of Nonferrous Metals Society of China,2007,17(04):698. |
| [15] | Batra R C;Kim C H .[J].International Journal of Engineering Science,1991,29(08):949. |
| [16] | Daridon L;Oussouaddi O;Ahzi S .Influence of the material constitutive models on the adiabatic shear band spacing: MTS, power law and Johnson-Cook models[J].International Journal of Solids and Structures,2004(11/12):3109-3124. |
| [17] | Xu Y B;Zhong W L;Chen Y J .[J].Materials Science and Engineering A:Structural Materials Properties Microstructure and Processing,2001,A 299(1-2):287. |
| [18] | Dodd B;Bai Y .[J].Materials Science and Technology,1985,1(01):38. |
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%