研究由 SiC 和 Sr 改性的原位 Mg2Sip/AM60B 复合材料在部分重熔过程中的组织演变和相变。结果表明：SiC 和 Sr 可以有效地细化初生α-Mg 晶粒和 Mg2Si 颗粒。部分重熔以后，可以获得具有细小球状初始α-Mg 颗粒的半固态组织。部分重熔过程中的组织演变可以分为4个阶段：快速粗化、组织分离、球状化和最终的粗化。组织演变的实质是因为发生相变：β→α，α+β→L 和α→L，α→L，α→L 和 L→α。Mg2Si 颗粒对于组织演变步骤没有太大影响，但会减慢演变进程且改变粗化机制。复合材料部分重熔时，由于 Mg2Si 颗粒的边角优先熔化，颗粒首先变钝，然后呈球状化，最后在 Ostwald 熟化作用下粗化。
The microstructural evolution and phase transformations during partial remelting of in-situ Mg2Sip/AM60B composite modified by SiC and Sr were investigated. The results indicate that SiC and Sr are effective for refining primary α-Mg grains and Mg2Si particles. After being partially remelted, a semisolid microstructure with small and spheroidal primary α-Mg particles can be obtained. The microstructural evolution during partial remelting can be divided into four stages: the initial rapid coarsening, structural separation, spheroidization and final coarsening, which are essentially caused by the phase transformations of β→α,α+β→L and α→L, α→L, and α→L and L→α, respectively. The Mg2Si particles have not obvious effect on the general microstructural evolution steps, but can slower the evolution progress and change the coarsening mechanism. During partial remelting, Mg2Si particles first become blunt and then become spheroidal because of melting of their edges and corners, and finally are coarsened owing to Ostwald ripening.
参考文献
| [1] | F. H. Froes;D. Eliezer;E. Aghion.The science, technology, and applications of magnesium[J].JOM,19989(9):30-34. |
| [2] | Liqing Chen;Yantao Yao.Processing, Microstructures, and Mechanical Properties of Magnesium Matrix Composites: A Review[J].金属学报（英文版）,2014(5):762-774. |
| [3] | M. MABUCHI;K. HIGASHI.STRENGTHENING MECHANISMS OF Mg-Si ALLOYS[J].Acta materialia,199611(11):4611-4618. |
| [4] | Benhai Yu;Dong Chen;Qingbin Tang;Chunlei Wang;Deheng Shi.Structural, electronic, elastic and thermal properties of Mg2Si[J].The journal of physics and chemistry of solids,20105(5):758-763. |
| [5] | Y.-Z. Lu;Q.-D. Wang;X.-Q. Zeng.Effects of silicon on microstructure, fluidity, mechanical properties, and fracture behaviour of Mg-6Al alloy[J].Materials Science and Technology: MST: A publication of the Institute of Metals,20012(2):207-214. |
| [6] | 申乐;陈体军;马颖;刘明伟;郝远.MgCO3和Sr对原位Mg2Si/AM60B复合材料的变质[J].特种铸造及有色合金,2011(7):653-655. |
| [7] | Hong T.W.;Kim S.K..Microstructural evolution and semisolid forming of SiC particulate reinforced AZ91HP magnesium composites[J].Materials Science and Technology: MST: A publication of the Institute of Metals,20007-8(7-8):887-892. |
| [8] | S. JI;MA QIAN;Z. FAN.Semisolid Processing Characteristics of AM Series Mg Alloys by Rheo-Diecasting[J].Metallurgical and Materials Transactions, A. Physical Metallurgy and Materials Science,20063(3):779-787. |
| [9] | D. Liu;H.V. Atkinson;P. Kapranos.Microstructural evolution and tensile mechanical properties of thixoformed high performance aluminium alloys[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,20031/2(1/2):213-224. |
| [10] | Xia K.;Tausig G..Liquidus casting of a wrought aluminum alloy 2618 for thixoforming[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,19981/2(1/2):1-10. |
| [11] | 郭明海;刘俊友;李艳霞.液固分离法近净成形SiCp/Al电子封装壳体的组织和性能[J].中国有色金属学报（英文版）,2014(4):1039-1045. |
| [12] | 贾琪瑾;刘俊友;李艳霞;王文韶.半固态触变成形制备高硅铝基电子封装盒体的组织与性能[J].中国有色金属学报（英文版）,2013(1):80-85. |
| [13] | CHEN Ti-jun;MA Ying;WANG Rui-quan;LI Yuan-dong;HAO Yuan.Microstructural evolution during partial remelting of AM60B magnesium alloy refined by MgCO3[J].中国有色金属学报（英文版）,2010(09):1615-1621. |
| [14] | JIANG Ju-fu;WANG Ying;QU Jian-jun;DU Zhi-ming;LUO Shou-jing.Preparation and thixoforging of semisolid billet of AZ80 magnesium alloy[J].中国有色金属学报（英文版）,2010(09):1731-1736. |
| [15] | T. J. Chen;W. B. Lu;Y. Ma;H. J. Huang;Y. Hao.Semisolid microstructure of AM60B magnesium alloy refined by SiC particles[J].International Journal of Materials Research,201112(12):1459-1467. |
| [16] | Z. Fan.Semisolid metal processing[J].International Materials Reviews,20022(2):49-85. |
| [17] | Z. Fan;J. Y. Chen.Modelling of rheological behaviour of semisolid metal slurries[J].Materials Science and Technology: MST: A publication of the Institute of Metals,20023(3):243-249. |
| [18] | 姜巨福;王迎;柳君;曲建俊;杜之明;罗守靖.新SIMA制备坯料触变挤压AZ61镁合金零件的组织与性能[J].中国有色金属学报（英文版）,2013(3):576-585. |
| [19] | 邢博;郝远;李元东;马颖;陈体军.自孕育法制备AZ31镁合金半固态流变成形组织[J].中国有色金属学报（英文版）,2013(3):567-575. |
| [20] | 尧军平;孙众;杨涛;Bharat BBUSHAN;龙文元;张磊.超声振动制备流变铸造AZ91镁合金浆料的微观组织和性能[J].中国有色金属学报（英文版）,2014(03):619-625. |
| [21] | DAVID H. StJOHN;MA QIAN;MARK A. EASTON.Grain Refinement of Magnesium Alloys[J].Metallurgical and Materials Transactions, A. Physical Metallurgy and Materials Science,20057(7):1669-1679. |
| [22] | T.-J. Chen;Y. Hao;Y.-D. Li.Effect of solid solution treatment on semisolid microstructure of dendritic zinc alloy ZA27[J].Materials Science and Technology,200811(11):1313-1320. |
| [23] | Evangelos Tzimas;Antonios Zavaliangos.Evolution of near-equiaxed microstructure in the semisolid state[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,20001/2(1/2):228-240. |
| [24] | V. A. Snyder;J. Alkemper.THE DEVELOPMENT OF SPATIAL CORRELATIONS DURING OSTWALD RIPENING: A TEST OF THEORY[J].Acta materialia,200010(10):2689-2701. |
| [25] | Luo, SJ;Chen, Q;Zhao, Z.An investigation of microstructure evolution of RAP processed ZK60 magnesium alloy[J].Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing,20091/2(1/2):146-152. |
| [26] | Czerwinski F;Zielinska-Lipiec A.The microstructure evolution during semisolid molding of a creep-resistant Mg-5Al-2Sr alloy[J].Acta materialia,200512(12):3433-3444. |
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