研究了等轴组织和魏氏组织两种组织类型的TC4钛合金坯料经不同变形量轧制变形后得到的棒材的组织演变以及室温力学性能变化。研究发现，对于原始坯料组织为等轴组织的TC4钛合金棒材，当轧制变形量达到并超过80％时，棒材组织发生了明显破碎，且随着轧制变形量的增加，棒材的强度升高，塑性变化不大；对于原始坯料组织为魏氏组织的TC4钛合金棒材，当轧制变形量达到并超过90％时，魏氏组织被完全等轴化，形成细小均匀的等轴组织。此外，70％的轧制变形量为轧制变形的临界点，两种组织类型的TC4钛合金坯料经轧制得到的棒材的室温力学性能在70％的轧制变形量前后均呈规律性变化。
The evolution of microstructures and mechanical properties of TC 4 titanium alloy bars rolled by the billets with the equiaxed and widmannstatten structures were studied at different rolling deformation , respectively .The results show that when the rolling deformation reaches or exceeds 80%, the microstructures of TC4 bars rolled by the billets with equiaxed structures are smashed and refined obviously , and the tensile strength is increasing with the increase of rolling deformation , but the ductility changes little .When the rolling deformation reaches or exceeds 90%, the micro-structures of TC4 bars rolled by the billets with widmannstatten structures are equiaxed completely and come to the homogeneous and slight equiaxed structures .Furthermore , it is found that the rolling deformation of 70%is a critical point , the room temperature properties of these two kinds of TC 4 bars by rolling take on regular changing at this rolling deformation .
参考文献
| [1] | Rhodes C G;Paton N E .Influence of alpha/beta interface phase on tensile properties of Ti-6Al-4V[J].Metallurgical and Materials Transactions A:Physical Metallurgy and Materials Science,1979,10(11):1752-1756. |
| [2] | Elmer JW;Palmer TA;Babu SS;Specht ED .In situ observations of lattice expansion and transformation rates of alpha and beta phases in Ti-6Al-4V[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2005(1/2):104-113. |
| [3] | 王金友;葛志明;周彦邦.航空用钛合金[M].上海:上海科学技术出版社,1985 |
| [4] | 张喜燕;赵永庆;白晨光.钛合金及应用[M].北京:化学工业出版社,2005 |
| [5] | 宁兴龙,王国宏.钛合金棒线材生产及市场预测[J].稀有金属材料与工程,1998(04):248-252. |
| [6] | Masuo Hagiwara .The development of titanium alloys in Ja-pan[J].Rare Metal Materials and Engineering,2006,35(z1):48-53. |
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