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退火處理及沉積方向?qū)す獬练eTA15鈦合金性能和組織的影響
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沈陽(yáng)航空航天大學(xué) 航空制造工藝數(shù)字化國(guó)防重點(diǎn)學(xué)科實(shí)驗(yàn)室,沈陽(yáng)航空航天大學(xué) 航空制造工藝數(shù)字化國(guó)防重點(diǎn)學(xué)科實(shí)驗(yàn)室,沈陽(yáng)航空航天大學(xué) 航空制造工藝數(shù)字化國(guó)防重點(diǎn)學(xué)科實(shí)驗(yàn)室,沈陽(yáng)航空航天大學(xué) 航空制造工藝數(shù)字化國(guó)防重點(diǎn)學(xué)科實(shí)驗(yàn)室,沈陽(yáng)航空航天大學(xué) 航空制造工藝數(shù)字化國(guó)防重點(diǎn)學(xué)科實(shí)驗(yàn)室,沈陽(yáng)航空航天大學(xué) 航空制造工藝數(shù)字化國(guó)防重點(diǎn)學(xué)科實(shí)驗(yàn)室

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TG146.2 3

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國(guó)家自然科學(xué)(51505301,51305280,51375316)；遼寧省自然科學(xué)(2015020118)


Effect of Annealing Treatment and Deposition Direction on Mechanical Properties and Microstructures of Laser Deposition Manufacturing TA15 titanium alloy
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Key Laboratory of Fundamental Science for National Defence of Aeronautical Digital Manufacturing Process,Shenyang Aerospace University,Key Laboratory of Fundamental Science for National Defence of Aeronautical Digital Manufacturing Process,Shenyang Aerospace University,Key Laboratory of Fundamental Science for National Defence of Aeronautical Digital Manufacturing Process,Shenyang Aerospace University,Key Laboratory of Fundamental Science for National Defence of Aeronautical Digital Manufacturing Process,Shenyang Aerospace University,Key Laboratory of Fundamental Science for National Defence of Aeronautical Digital Manufacturing Process,Shenyang Aerospace University,Key Laboratory of Fundamental Science for National Defence of Aeronautical Digital Manufacturing Process,Shenyang Aerospace University

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    摘要:

    以TA15鈦合金粉末為原料,利用激光沉積制造方法制備TA15鈦合金拉伸試樣厚壁件。通過(guò)光學(xué)顯微鏡(OM)、掃描電子顯微鏡(SEM)和X射線(xiàn)衍射(XRD)等方法研究退火溫度及沉積方向?qū)A15鈦合金組織、拉伸性能的影響,以及α相變形機(jī)制。結(jié)果表明：隨著退火溫度升高,顯微組織中α相長(zhǎng)寬比呈上升趨勢(shì)；激光沉積成形TA15鈦合金厚壁件在沉積和垂直沉積方向上的力學(xué)性能存在差異,沉積方向上的抗拉強(qiáng)度明顯均低于垂直沉積方向上的抗拉強(qiáng)度；柱狀晶晶界對(duì)α片層的受力變形有一定的阻礙作用；α片層通過(guò)擠壓變形和滑移變形兩種機(jī)制發(fā)生變形或斷裂；兩種方向上拉伸斷裂方式不同,沿沉積方向上斷裂為韌性斷裂,沿垂直沉積方向上斷裂為半解理半韌性斷裂。

    Abstract:

    The TA15 titanium alloy plates were prepared by laser deposition manufacturing using TA15 titanium alloy powder. The effect of annealing treatment and deposition direction on microstructure, and mechanical properties of laser deposition manufacturing TA15 titanium alloy and alpha phase deformation mechanism has been studied. The experimental results showed that the length-width ratio of alpha phase in microstructure shows risen when increasing the annealing temperature; the mechanical properties are different in deposition direction and vertical deposition direction; the tensile strength in the deposition direction is obviously lower than that in the vertical direction; columnar crystal grain boundary has a baffling effect on alpha lamellar distortion; alpha lamellar deformation or fracture by extrusion and slippage; different directions have different tensile fracture modes, deposition direction is ductile fracture, vertical deposition direction is semi-cleavage and semi-ductile fracture.

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楊光,王文東,欽蘭云,李長(zhǎng)富,任宇航,王維.退火處理及沉積方向?qū)す獬练eTA15鈦合金性能和組織的影響[J].稀有金屬材料與工程,2016,45(12):3295~3301.[Yang Guang, Wang Wendong, Qin Lanyun, Li Changfu, Ren Yuhang, Wang Wei. Effect of Annealing Treatment and Deposition Direction on Mechanical Properties and Microstructures of Laser Deposition Manufacturing TA15 titanium alloy[J]. Rare Metal Materials and Engineering,2016,45(12):3295~3301.]
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  • 收稿日期:2016-02-29
  • 最后修改日期:2016-04-18
  • 錄用日期:2016-04-27
  • 在線(xiàn)發(fā)布日期: 2017-02-06
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