TiNi合金冲击相变过程中温度变化规律的实验研究

刘永贵; 唐志平; 崔世堂

doi:10.11883/1001-1455(2014)06-0679-06

TiNi合金冲击相变过程中温度变化规律的实验研究

doi: 10.11883/1001-1455(2014)06-0679-06

中国科学技术大学中科院材料力学行为和设计重点实验室, 安徽合肥 230027

详细信息

作者简介:
刘永贵(1982—), 男, 博士研究生

中图分类号: O347.1
计量
- 文章访问数: 3455
- HTML全文浏览量: 331
- PDF下载量: 358
- 被引次数: 0
出版历程
- 收稿日期: 2013-04-25
- 刊出日期: 2014-11-25

Experimental study on temperature evolution of TiNi alloy during shock-induced phase transformation

CAS Key Laboratory of Mechanical Behavior and Design of Materials, University ofScience and Technology of China, Hefei 230027, Anhui, China

More Information

Corresponding author: Tang Zhi-ping, zptang@ustc.edu.cn

摘要

摘要: 针对初始SME(shape memory effect)和PE(pseudo-elastic)状态TiNi合金试样，采用带有红外测温系统的SHPB冲击压缩装置，实时测量了冲击相变过程中两种材料试样表面瞬态温度，并根据实验结果计算了相应的温度变化。实验结果表明，冲击加载相变过程中，温度随相变应变的增大而升高，当应变最大时，温度最高；卸载过程中，对初始PE状态试样，温度降低，对初始SME状态试样，温度保持最高温度不变或降低，这同加载最高温度有关；卸载完成后，两种试样温度均高于其初始温度。计算温度结果表明，相变耗散功对加、卸载相变过程中温度变化的作用不可忽略。
- 固体力学 /
- 瞬态温度 /
- 红外测温 /
- TiNi合金 /
- 实时 /
- 冲击相变 /
- 相变耗散功
Abstract: Aimed to two kinds of TiNi alloy, that is, initial shape-memory effect TiNi alloy and pseudo-elastic TiNi alloy, the transient temperatures at the surfaces of the TiNi alloy specimens were measured during dynamic deformation in real time by using the compression split Hopkinson pressure bar device with an infrared detector system.And the corresponding temperature changes were calculated according to the experimental stress-strain curves.Temperature-measurement results indicate that significant temperature change was observed in the process of phase transformation.Specifically, during loading, the temperature increased with the increasing of the phase transformation strain, and reached its highest at the highest phase transformation strains.While during unloading, for the initial pseudo-elastic specimens, the temperature decreased significantly, in contrast, for the initial shape-memory effect specimens, the temperature kept the highest temperature constant or dropped, which is depended on the highest loading temperature.After a cycle of loading/unloading, the temperatures of the specimens with two initial states are higher than their initial ones.The calculated results show that the effect of transformation dissipation work on the temperature change can not be ignored.
- solid mechanics /
- transient temperature /
- infrared temperature measurement /
- TiNi alloy /
- real time /
- shocked-induced transformation /
- transformation dissipation work

HTML全文

图 1 TiNi形状记忆合金试样的典型冲击压缩信号图

Figure 1. Raw data of shock compression of TiNi alloy specimen

下载: 全尺寸图片幻灯片

图 2 初始SME状态试样的应力应变关系和实时温度

Figure 2. Stress-strain curves and real-time temperature curves of SME specimens

下载: 全尺寸图片幻灯片

图 3 初始PE状态试样的应力应变关系和实时温度

Figure 3. Stress-strain curves and temperature curves of PE specimens

下载: 全尺寸图片幻灯片

图 4 初始SME状态试样的冲击相变过程温度变化

Figure 4. Temperature change of SME specimens in the process of phase transformation

下载: 全尺寸图片幻灯片

图 5 初始PE状态试样的冲击相变过程温度变化

Figure 5. Temperature change of PE specimens in the process of phase transformation

下载: 全尺寸图片幻灯片

表 1 TiNi合金基本热力学参数

Table 1. Properties of TiNi alloy in the experiment

状态	ρ/(kg·m^-3)	L/(J·g^-1)	c_p(J·g^-1·℃^-1)	M_s/℃	M_f/℃	A_s/℃	A_f/℃
SME	6 450	12.90	0.50	13.2	15.4	46.2	52.3
PE	6 450	8.77	0.45	-27.4	-48.5	-26.6	-9.2

下载: 导出CSV

表 2 实验的参数和主要结果

Table 2. Experimental parameters and main results

状态	实验	v₀/(m·s^-1)	σ_t/MPa	ε_m	ε_r
	1	4.6	115.8	0.015	0.021
SME	2	7.5	115.8	0.027	0.024
	3	12.7	115.8	0.042	0.033
	4	10.2	589.5	0.012	0.006
PE	5	14.5	589.5	0.030	0.010
	6	17.8	589.5	0.047	0.012

下载: 导出CSV

表 3 测量和计算的温度

Table 3. Measured and calculated temperatures

状态	实验	测量		计算
状态	实验	θ_m/℃	θ_u/℃	θ₁/℃	θ₂/℃	θ_m/℃	θ_u/℃
	1	30.4	30.4	1.0	8.0	33.0	33.0
SME	2	37.5	35.5	2.2	13.3	39.5	36.8
	3	48.0	41.0	4.6	20.0	48.6	42.2
	4	33.3	25.6	2.7	5.3	32.0	25.1
PE	5	43.3	30.2	7.4	10.6	42.0	30.8
	6	51.2	32.5	10.9	16.6	51.5	33.9

下载: 导出CSV

参考文献(14)

[1]	Shaw J A, Kyriakides S. Thermo-mechanical aspects of NiTi[J]. Journal of the Mechanics and Physics of Solids, 1995, 43(8): 1243-1281.
[2]	Vitiello A, Giorleo G, Morace R E. Analysis of thermo-mechanical behaviour of Nitinol wires with high strain rates[J]. Smart Materials and Structures, 2005, 14(1): 215-221.
[3]	Lim T J, McDowell D L. Cyclic thermomechanical behavior of a polycrystalline pseudoelastic shape memory alloy[J]. Journal of the Mechanics and Physics of Solids, 2002, 50(3): 651-676.
[4]	Helm D, Haupt P. Thermomechanical behavior of shape memory alloys[C]//Lynch S. Proc of SPIE's 8th Annual International Symposium on Smart Structures and Materials. 2001: 302-313.
[5]	Corneliu C. Shape memory alloys[M]. 2010: 17-40.
[6]	Morin C, Moumni Z, Zaki W. Thermomechanical coupling in shape memory alloys under cyclic loadings: Experimental analysis and constitutive modeling[J]. International Journal of Plasticity, 2011, 27: 1959-1980.
[7]	Gadaj S P, Nowacki W K, Pieczyska E A. Temperature evolution in deformed shape memory alloy[J]. Infrared Physics & Technology, 2002, 43(3): 151-155.
[8]	Chen Wei-nong, Song Bo. Temperature dependence of a NiTi shape memory alloy's superelastic behavior at a high strain rate[J]. Journal of Mechanics of Materials and Structures, 2006, 1(2): 339-356.
[9]	Hodowany K R. On the conversion of plastic work into heat[D]. California Institute of Technology, 1997.
[10]	Mason J J, Rosakis A J, Ravichandran G. On the strain and strain rate dependence of the fraction of plastic work converted into heat: An experimental study using high speed infrared detectors and the Kolsky bar[J]. Mechenics of Materials, 1994, 17(2): 135-145.
[11]	Marchand A, Duffy J. An experimental study of the formation process of adiabatic shear bands in a structural steel[J]. Journal of the Mechanics and Physics of Solids, 1988, 36(3): 251-283.
[12]	刘永贵, 唐志平, 崔世堂.冲击载荷下瞬态温度的实时测量方法[J].爆炸与冲击, 2014, 34(4): 471-476. Liu Yong-gui, Tang Zhi-ping, Cui Shi-tang. Real-time measuring methods for transient temperature under shock loading[J]. Explosion and Shock Waves, 2014, 34(4): 471-476.
[13]	王礼立.应力波基础[M].北京: 国防工业出版社, 2005: 51-55.
[14]	Jy R D.红外系统原理[M].北京: 国防工业出版社, 1975.