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首页> 外文期刊>Journal of Materials Engineering and Performance >Correlation Between Tensile Strength and Hardness of Electron Beam Welded TC4-DT Joints
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Correlation Between Tensile Strength and Hardness of Electron Beam Welded TC4-DT Joints

机译：电子束焊接TC4-DT接头抗拉强度与硬度的相关性

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摘要

Correlation between tensile strength and hardness for damage-tolerant Ti-6Al-4V (TC4-DT) alloy and its electron beam welded joints was investigated. Yield strength (YS), ultimate tensile strength (UTS) and strain hardening coefficient of base metal and weld metal were obtained using uniaxial tensile tests. Microhardness of the base metal, heat affected zone, and weld metal was measured. Then, the linear correlations among the yield strength, tensile strength, and hardness were proposed. Moreover, correlation between strain hardening coefficient and the ratio of YS to UTS (YS/UTS) was established. The results indicate that microhardness can be used to predict the YS and UTS of the TC4-DT welded joint successfully. In addition, the strain hardening coefficient can be predicted by the YS/UTS. The prediction of strength and strain hardening coefficient is in agreement with the experiments. The correlations are applicable and valuable for the strength prediction of narrow welded fusion zone and heat affected zone based on the microhardness measurement.
机译：研究了耐损伤的Ti-6Al-4V（TC4-DT）合金及其电子束焊接接头的拉伸强度与硬度之间的相关性。使用单轴拉伸试验获得母材和焊缝金属的屈服强度（YS），极限抗拉强度（UTS）和应变硬化系数。测量了母材，热影响区和焊缝金属的显微硬度。然后，提出了屈服强度，拉伸强度和硬度之间的线性关系。此外，建立了应变硬化系数与YS与UTS之比（YS / UTS）之间的相关性。结果表明，显微硬度可以成功地预测TC4-DT焊接接头的YS和UTS。另外，可以通过YS / UTS预测应变硬化系数。强度和应变硬化系数的预测与实验一致。这些相关性对于基于显微硬度测量的窄焊接熔合区和热影响区的强度预测是适用的且有价值的。

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