-1），來研究應(yīng)變和應(yīng)變率對(duì)鈦合金冷變形中微觀組織演變的影響。結(jié)果表明，較大的真應(yīng)變和較高的應(yīng)變率容易使材料內(nèi)部產(chǎn)生局部晶粒粗化和絕熱剪切帶。真應(yīng)變應(yīng)選擇在0.2~0.6的范圍內(nèi)。1.0 s-1的應(yīng)變速率下，組織均勻且晶粒細(xì)小，適合冷變形。在冷變形過程中觀察到的變形軟化主要是由在較大的真應(yīng)變和應(yīng)變速率下產(chǎn)生的絕熱溫升和局部晶粒粗化引起的。"/>

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航空航天緊固件用TC16鈦合金在冷壓縮過程中的組織演變
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作者單位:

1.上海工程技術(shù)大學(xué) 機(jī)械與汽車工程學(xué)院，上海 201620;2.中北大學(xué) 材料科學(xué)與工程學(xué)院，山西 太原 030051

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基金項(xiàng)目:

The National Natural Science Foundation of China (51805314)


Microstructure Evolution of TC16 Titanium Alloy for Producing Aerospace Fasteners During Cold Compression
Author:
Affiliation:

1.School of Mechanical and Automotive Engineering, Shanghai University of Engineering Science, Shanghai 201620, China;2.School of Material Science and Engineering, North University of China, Taiyuan 030051, China.

Fund Project:

National Natural Science Foundation of China (51805314)

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    摘要:

    為了解鈦合金在冷壓縮過程中的變形機(jī)理和微觀組織演變，使用Gleeble 3800熱模擬試驗(yàn)機(jī)進(jìn)行冷壓縮試驗(yàn)。在冷壓縮試驗(yàn)中，通過不同應(yīng)變（0.2、0.4、0.6、0.8和1.0）和不同應(yīng)變率（0.1、1.0和10.0 s-1），來研究應(yīng)變和應(yīng)變率對(duì)鈦合金冷變形中微觀組織演變的影響。結(jié)果表明，較大的真應(yīng)變和較高的應(yīng)變率容易使材料內(nèi)部產(chǎn)生局部晶粒粗化和絕熱剪切帶。真應(yīng)變應(yīng)選擇在0.2~0.6的范圍內(nèi)。1.0 s-1的應(yīng)變速率下，組織均勻且晶粒細(xì)小，適合冷變形。在冷變形過程中觀察到的變形軟化主要是由在較大的真應(yīng)變和應(yīng)變速率下產(chǎn)生的絕熱溫升和局部晶粒粗化引起的。

    Abstract:

    To understand the deformation mechanism and microstructure evolution of TC16 titanium alloy during cold heading, cold compression tests were conducted using a Gleeble 3800 thermo-mechanical simulator. The effects of strains (0.2, 0.4, 0.6, 0.8 and 1.0) and strain rates (0.1, 1.0 and 10.0 s-1) on the deformation behavior and microstructure evolution of the alloys were investigated. Results show that larger true strain and higher strain rate are prone to cause local grain coarsening and adiabatic shear bands within the material. True strain should be selected in the range from 0.2 to 0.6. Uniform structure and fine grains that are suitable for cold forming can be achieved at a strain rate of 1.0 s-1. The deformation softening observed during cold deformation is caused mainly by adiabatic temperature rise and local grain coarsening at larger true strains and higher strain rates.

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引用本文

楊萬博,霍元明,何濤,薛勇,胡玉佳,沈夢(mèng)藍(lán).航空航天緊固件用TC16鈦合金在冷壓縮過程中的組織演變[J].稀有金屬材料與工程,2022,51(2):386~391.[Yang Wanbo, Huo Yuanming, He Tao, Xue Yong, Hu Yujia, Shen Menglan. Microstructure Evolution of TC16 Titanium Alloy for Producing Aerospace Fasteners During Cold Compression[J]. Rare Metal Materials and Engineering,2022,51(2):386~391.]
DOI：10.12442/j. issn.1002-185X.20200935

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  • 收稿日期:2020-12-03
  • 最后修改日期:2022-01-12
  • 錄用日期:2021-02-04
  • 在線發(fā)布日期: 2022-03-03
  • 出版日期: 2022-02-28