兩相鈦合金熱加工中初生帶狀α相形態(tài)演變（英文）
發(fā)布時間：2018-09-05 11:04
【摘要】：為實現鈦合金初生帶狀α相的球化,以具有這種組織的TA15鈦合金為對象,研究其在熱加工中的組織演變。結果表明:帶狀α相形態(tài)演變的機理與片層組織球化機理相同。由于帶狀α相尺寸較大,界面分離和末端物質遷移機制較粗化更為重要。帶狀α相在退火中較為穩(wěn)定,主要原因是:內部晶界的幾何取向不利于球化、帶狀組織的寬度較大和α粒子幾何穩(wěn)定性高。預變形和低速變形通過以下方式加速球化:直接改變α相的幾何形狀、通過增加大角度晶界以及相界的面積促進界面分離和末端物質遷移、通過形成位錯結構促進粗化。采用大預變形結合高溫退火是球化帶狀α相的有效途徑。
[Abstract]:In order to realize the spheroidization of primary banded 偽 phase of titanium alloy, the microstructure evolution of TA15 titanium alloy with this kind of microstructure was studied. The results show that the morphologic evolution mechanism of banded 偽 phase is the same as that of lamellar spheroidization. Because of the larger size of the banded 偽 phase, the mechanism of interface separation and terminal material migration is more important than that of coarsening. The band 偽 phase is stable in annealing mainly because the geometric orientation of grain boundary is not conducive to spheroidization, the width of band structure is larger and the geometric stability of 偽 particles is high. Pre-deformation and low-velocity deformation accelerate spheroidization by directly changing the geometry of 偽 phase, by increasing the area of large angle grain boundary and phase boundary to promote interface separation and terminal material migration, and by forming dislocation structure to promote coarsening. Large predeformation combined with high temperature annealing is an effective approach for spheroidized zonal 偽 phase.
【作者單位】： 西北工業(yè)大學材料學院凝固技術國家重點實驗室;
【基金】：Projects(51205317,51575449) supported by the National Natural Science Foundation of China Project(3102015AX004) supported by the Fundamental Research Funds for the Central Universities,China Project(104-QP-2014) supported by the Research Fund of the State Key Laboratory of Solidification Processing,China
【分類號】：TG146.23
[Abstract]:In order to realize the spheroidization of primary banded 偽 phase of titanium alloy, the microstructure evolution of TA15 titanium alloy with this kind of microstructure was studied. The results show that the morphologic evolution mechanism of banded 偽 phase is the same as that of lamellar spheroidization. Because of the larger size of the banded 偽 phase, the mechanism of interface separation and terminal material migration is more important than that of coarsening. The band 偽 phase is stable in annealing mainly because the geometric orientation of grain boundary is not conducive to spheroidization, the width of band structure is larger and the geometric stability of 偽 particles is high. Pre-deformation and low-velocity deformation accelerate spheroidization by directly changing the geometry of 偽 phase, by increasing the area of large angle grain boundary and phase boundary to promote interface separation and terminal material migration, and by forming dislocation structure to promote coarsening. Large predeformation combined with high temperature annealing is an effective approach for spheroidized zonal 偽 phase.
【作者單位】： 西北工業(yè)大學材料學院凝固技術國家重點實驗室;
【基金】：Projects(51205317,51575449) supported by the National Natural Science Foundation of China Project(3102015AX004) supported by the Fundamental Research Funds for the Central Universities,China Project(104-QP-2014) supported by the Research Fund of the State Key Laboratory of Solidification Processing,China
【分類號】：TG146.23
【參考文獻】
相關期刊論文 前3條
1 董顯娟;魯世強;鄭海忠;;層片組織Ti-6.5Al-2Zr-1Mo-1V合金動態(tài)等軸化動力學行為（英文）[J];Transactions of Nonferrous Metals Society of China;2016年05期
2 羅皎;李蓮;李淼泉;;熱加工過程中2種原始組織的Ti-5Al-2Sn-2Zr-4Mo-4Cr合金變形行為（英文）[J];Transactions of Nonferrous Metals Society of China;2016年02期
3 樊曉光;楊合;高鵬飛;嚴思梁;;大型TA15鈦合金板坯熱加工中α相形態(tài)演變(英文)[J];Transactions of Nonferrous Metals Society of China;2013年12期
【共引文獻】
相關期刊論文 前4條
1 樊曉光;楊合;高鵬飛;左瑞;雷鵬輝;吉U，
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