A high specific Young’s modulus steel reinforced by spheroidal kappa-carbide
A high specific Young’s modulus steel reinforced by spheroidal kappa-carbide
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采用球状卡帕碳化物增强的高比杨氏模量钢
DOI：
10.1016/j.jmst.2021.01.033
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发表时间：
2021
影响因子：
10.9
通讯作者：
H.L. Yi
中科院分区：
文献类型：
--
作者：
P. Chen;J. Fu;X. Xu;C. Lin;J.C. Pang;X.W. Li;R.D.K. Misra;G.D. Wang;H.L. Yi
高强度钢继续被开发用于汽车应用，以提高安全性，并通过向下测量来降低重量[1，2]。此外，降低密度是汽车零部件轻量化的另一个解决方案[3，4]。铝的加入可以有效地降低钢的密度，因为它的原子质量很低，并引起晶格膨胀[5]。然而，铝的加入导致钢的杨氏模数降低[5]。刚度(S)是汽车零部件，特别是底盘和悬架等零部件的重要安全性能参数[6]，其关系式为：S=Et 2(E：杨氏模数；t：厚度)。向下测量和杨氏模数降低都对刚度有负面影响[6，8]。因此，具有可接受杨氏模数的低密度钢，即高比模钢，是下一代汽车用轻质材料最有利的选择。在过去的几十年里，TiB2陶瓷被引入到钢基体中作为增强体，由于其高杨氏模数为540GPA，低密度为4.45g cm−3[6，9]。此外，根据平衡相图[10，11]，在钢液凝固过程中，通过共晶反应可以生成体积分数高达0.12的TiB2。TiB2的高含量与钛和硼在钢液中的大量溶解有关，而氮和氧在钢液中的低溶解度只会导致少量的氮化物和氧化物[9]。然而，TiB2的大长径比和大尺寸的共晶组织对钢的力学性能有不利影响。此外，对于汽车钢的典型工艺--板坯连铸或薄带连铸来说，大量添加极其活跃的元素钛是一个真正的挑战[14]。此外，还没有研究表明，在传统的制造工艺中，由凝固过程中的共晶反应形成的具有片层或树枝晶形态的大尺寸TiB2可以球化。这将限制TiB2增强钢力学性能的进一步提高。
High strength steels continue to be developed for automotive applications to increase safety and reduce lightweight by down-gauging [1, 2]. In addition, reducing density is another solution for the lightweight of automotive components [3, 4]. Aluminum addition could effectively reduce the density of steels, since it has a low atomic mass and invokes a lattice expansion [5]. However, the addition of aluminum leads to a reduction in Young’s modulus of steels [5]. The stiffness (S) is an important safety performance parameter for automotive components, especially for parts such as chassis and suspension [6] and is given by [7]: S= Et 2 (E: Young’s modulus; t: thickness). Both the down-gauging and the Young’s modulus reduction have negative effects on stiffness [6, 8]. Therefore, low-density steels with an acceptable Young’s modulus, ie high specific modulus steels, are the most favorable choice for the next-generation lightweight materials for automotive applications.In past decades, TiB 2 ceramic was introduced in the steel matrix as reinforcement for developing a high specific modulus steel, due to its high Young’s modulus of 540 GPa and low density of 4.45 g cm− 3 [6, 9]. In addition, TiB 2 can be formed with a large volume fraction up to 0.12 by a eutectic reaction during the solidification of liquid steels based on the equilibrium phase diagram [10, 11]. The high fraction of TiB 2 is related to the large solubility of both Ti and B in liquid steels, while the low solubility of nitrogen and oxygen in liquid steels could induce only a small amount of nitrides and oxides [9]. However, the high aspect ratio and large size of TiB 2 particles with a eutectic structure have detrimental effects on the mechanical properties of steels [6, 12, 13]. Furthermore, the high addition of an extremely active element Ti is a real challenge for slab casting or strip casting, which are typical processes for automotive steels [14]. Besides, there are no studies indicating that the large-size TiB 2 with a lamellar or dendritic morphology, formed by a eutectic reaction during the solidification process, can be spheroidized during the conventional manufacturing process. These will limit further improvement in mechanical properties of TiB 2 reinforced steels.
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DOI：
10.1007/bf02647751
发表时间：
1996
期刊：
Metallurgical and Materials Transactions A
影响因子：
--
作者：
E. Taleff;C. Syn;D. Lesuer;O. Sherby
通讯作者：
E. Taleff;C. Syn;D. Lesuer;O. Sherby
DOI：
10.1016/0036-9748(84)90397-1
发表时间：
1984-08
期刊：
Scripta Metallurgica
影响因子：
--
作者：
T. Oyama;O. Sherby;J. Wadsworth;B. Walser
通讯作者：
T. Oyama;O. Sherby;J. Wadsworth;B. Walser
影响因子：
9.8
作者：
Tasan, C. C.;Hoefnagels, J. P. M.;Raabe, D.
通讯作者：
Raabe, D.
影响因子：
6
作者：
Jongsang Lee;N. Kim;Jaimyun Jung;Eon-Sik Lee;S. Ahn
通讯作者：
Jongsang Lee;N. Kim;Jaimyun Jung;Eon-Sik Lee;S. Ahn
DOI：
10.1007/s11661-998-0245-4
发表时间：
1998-04-01
影响因子：
2.8
作者：
Verhoeven, JD;Gibson, ED
通讯作者：
Gibson, ED