利用示差扫描量热法(DSC)研究了TiNiCu双向记忆弹簧训练过程中热机械训练及退火对合金相变特征的影响.结果表明,训练前升温时,DSC曲线表现出的吸热峰由多个小峰组成,随着训练次数的增加,峰的个数减少,具有稳定双向记忆效应的试样中,升温时只出现一个锐利的峰.这是因为在训练过程中引入特定取向的位错,产生一定的应力场,使得马氏体变体的取向比较一致,相变点基本相同所致.由于位错的引入,引起相变点As和Af下降.训练不同次数的样品400℃退火后,由多个小峰组成的吸热峰合并为一个峰,这是由退火导致热机械训练诱发特定取向的位错恢复引起的.
参考文献
| [1] | Duerig T W .Application of shape memory[J].Materials Science Forum,1990,56-58:679-692. |
| [2] | 赵连城;蔡伟.形状记忆合金的研究进展[J].功能材料,1995(zk):46-47. |
| [3] | 杨大智;张连生;王风庭.形状记忆合金[M].大连:大连理工大学出版社,1998:50. |
| [4] | 周守理 .形状记忆合金在航空航天领域的应用与进展[J].天津冶金,1998,1:1-3. |
| [5] | E.Cingolani;J.V.Humbeeck .Stabilization and two-way shape memory effect in Cu-Al-Ni single crystals[J].Metallurgical and materials transactions. A, physical metallurgy and materials science,1999(3):493-499. |
| [6] | Guilemany J M;FERNANDEZ J .Effect of training time on two way shape memory effect obtained by stress induced martensite[J].Scripta Metallurgica et Materialia,1994,30:59-61. |
| [7] | Wang Z G;ZU X T;FENG X D et al.Study of two-way shape memory extension spring of narrow hysteresis TiNiCu shape memory alloys[J].Materials Letters,2002,56(03):284-288. |
| [8] | Wang ZG.;Zu XT.;Feng XD.;Lin LB.;Zhu S.;You LP.;Wang LM. .Design of TiNi alloy two-way shape memory coil extension spring[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2003(1/2):249-254. |
| [9] | Miller D A;Lagoudas D C .Thernomechanical characterization of NiTiCu and NiTi SMA actuators:influence of plastic strain[J].Smart Materials and Structures,2000,9:640-645. |
| [10] | 徐祖耀.马氏体相变与马氏体[M].北京:科学出版社,1999:59-60. |
| [11] | 谭树松;徐惠彬;Mullerl .单向、双向记忆合金的相变热测定[J].金属学报,1994,30(09):404-407. |
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%