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U-Nb形狀記憶合金熱彈性馬氏體相變的相場(chǎng)模擬
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中國(guó)工程物理研究院 材料研究所，四川 江油 621907

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國(guó)家自然科學(xué)基金項(xiàng)目（51701191）


Phase-Field Simulation of Thermoelastic Martensitic Transformation in U-Nb Shape Memory Alloys
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Affiliation:

Institute of Materials, China Academy of Engineering Physics, Jiangyou 621907, China

Fund Project:

National Natural Science Foundation of China (51701191)

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    摘要:

    U-Nb形狀記憶合金具有優(yōu)異的抗腐蝕性和力學(xué)性能，其中亞穩(wěn)α?相的典型微觀組織為多層級(jí)孿晶馬氏體。利用相場(chǎng)法模擬α?相熱彈性馬氏體的形成過(guò)程。結(jié)果表明，在彈性應(yīng)變能最小化的驅(qū)動(dòng)下，獲得了多種自協(xié)調(diào)馬氏體組織，也發(fā)現(xiàn)了多種自協(xié)調(diào)模式。對(duì)比本研究模擬結(jié)果和文獻(xiàn)中的實(shí)驗(yàn)結(jié)果，認(rèn)為相變變形梯度矩陣的反對(duì)稱性和界面兼容性顯著影響變體結(jié)對(duì)和孿晶面。另外，基于變體重排過(guò)程，預(yù)測(cè)了相變態(tài)組織在變形初期的織構(gòu)演化。

    Abstract:

    Metastable α?-phase U-Nb shape memory alloys exhibit outstanding corrosion resistance and mechanical property, in which multi-level twinning martensite is the typical microstructure. Phase-field method was used to simulate the formation process of α? thermoelastic martensite. Results show that driven by minimization of elastic strain energy, various self-accommodated martensite clusters are obtained, and several self-accommodation modes are found. Comparing the simulated results with experimental results, it is suggested that the asymmetric deformation gradient tensor and interface compatibility notably influence the variant pair and twinning plane. In addition, the texture development upon deformation was predicted based on the variant rearrangement process.

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引用本文

崔書山,張雷,法濤.U-Nb形狀記憶合金熱彈性馬氏體相變的相場(chǎng)模擬[J].稀有金屬材料與工程,2022,51(2):452~460.[Cui Shushan, Zhang Lei, Fa Tao. Phase-Field Simulation of Thermoelastic Martensitic Transformation in U-Nb Shape Memory Alloys[J]. Rare Metal Materials and Engineering,2022,51(2):452~460.]
DOI：10.12442/j. issn.1002-185X.20200993

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歷史
  • 收稿日期:2020-12-23
  • 最后修改日期:2022-02-16
  • 錄用日期:2021-03-08
  • 在線發(fā)布日期: 2022-03-03
  • 出版日期: 2022-02-28