镁铝合金的冲击熔化行为实验研究

谭叶; 肖元陆; 薛桃; 李俊; 金柯

doi:10.11858/gywlxb.20190729

镁铝合金的冲击熔化行为实验研究

doi: 10.11858/gywlxb.20190729

中国工程物理研究院流体物理研究所冲击波物理与爆轰物理重点实验室，四川绵阳　621999

基金项目: 国家自然科学基金青年科学基金（11802285）

详细信息

作者简介:
谭　叶（1986－），男，硕士，副研究员，主要从事材料高压物性研究. E-mail: yetan@caep.cn

通讯作者:
金　柯（1976－），男，博士，研究员，主要从事材料高压物性研究. E-mail: jinke102@caep.cn

中图分类号: O521.2
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出版历程
- 收稿日期: 2019-02-26
- 修回日期: 2019-03-14
- 刊出日期: 2019-06-25

Melting of MB2 Alloy under Shock Compression

National Key Laboratory of Shock Waves and Detonation Physics, Institute of Fluid Physics, CAEP, Mianyang 621999, China

摘要

摘要: 采用反向碰撞实验技术，结合具有高时空分辨率的全光纤激光干涉测速技术，对镁铝合金开展了极端动态压缩条件下的动力学行为实验研究，获得了镁铝合金在30～73 GPa压力范围内的Hugoniot和声速实验数据。深入的数据分析表明，所获得的Hugoniot数据与早期的Hugoniot数据一致，但是纵波声速却呈现出明显的向体波声速转变的趋势，对应冲击加载下镁铝合金的固-液熔化相变，相变压力区间为40～57 GPa。
- 冲击压缩 /
- 熔化 /
- 声速 /
- 镁铝合金 /
- 相变
Abstract: Reverse impact experiments were performed at a shock pressure range from 30 GPa to 73 GPa to investigate the dynamic response of magnesium aluminum alloy. A displacement interferometer system for any reflector was employed to measure the impact velocity and sample/window interface particle velocities. The Hugoniot data obtained in this study had a good agreement with the data published before, however, the sound velocities extracted from our experiments showed a transition from longitudinal to bulk sound velocity. This discontinuity is attributed to melting transition under shock compression, and the transition pressure range is estimated from 40 GPa to 57 GPa.
- shock compression /
- melting /
- sound velocity /
- magnesium aluminum alloy /
- phase transition

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图 1 反向碰撞实验示意图

Figure 1. Schematic of backward-impact experimental configuration

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图 2 反向碰撞实验p-u图

Figure 2. p-u relation for backward-impact experiment

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图 3 MB2/LiF界面粒子速度剖面

Figure 3. Particle velocity profile of MB2/LiF interface

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图 4 冲击波速度与粒子速度的关系

Figure 4. Shock velocity vs. particle velocity

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图 5 声速与冲击压力的关系

Figure 5. Sound velocity vs. shock pressure

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图 6 反碰撞法测量声速实验中不确定度

Figure 6. Uncertainties for backward-impact experiment based on law of propagation

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表 1 MB2样品冲击实验参数及结果

Table 1. Shock experiment parameters and results of MB2

Exp.No.	h_s/mm	W/(km·s^–1)	u_w/(km·s^–1)	u_s/(km·s^–1)	D_s/(km·s^–1)	p/GPa	C_l/(km·s^–1)
1	1.980±0.004	3.949±0.020	1.589±0.016	2.360±0.026	7.303±0.166	30.6±0.4	7.983±0.297
2	1.997±0.004	4.358±0.020	1.763±0.018	2.595±0.027	7.607±0.175	35.0±0.5	9.101±0.394
3	1.978±0.004	5.379±0.027	2.195±0.022	3.184±0.030	8.317±0.191	47.0±0.7	9.167±0.402
4	1.981±0.004	5.928±0.030	2.435±0.024	3.493±0.039	8.746±0.214	54.2±0.9	8.912±0.380
5	1.981±0.004	6.100±0.030	2.514±0.025	3.586±0.039	8.907±0.213	56.7±0.9	8.601±0.348
6	1.987±0.004	7.220±0.036	3.003±0.030	4.217±0.050	9.747±0.245	73.0±1.2	9.723±0.463

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参考文献(16)

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