High temperature mechanical properties of cryogenically cooled alloy 718 weldments

Manikandan S. G. K.; Sivakumar D.; Kamaraj M.

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High temperature mechanical properties of cryogenically cooled alloy 718 weldments

机译：低温冷却的718合金焊件的高温机械性能

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The micro-segregation of niobium and Laves phase formation during Gas Tungsten Arc (GTA) welding of alloy 718 were studied by employing different cooling techniques which resulted in weld cooling rates ranging from 43.2 degrees C/s to 508.7 degrees C/s. The weld cooling rates were achieved by the combinations of modified pulse wave form, argon and helium shielding gases, copper heat sink and liquid nitrogen cooling. A combination of compound current pulse (CCP) waveform with helium shielding and liquid nitrogen cooling resulted in lesser niobium segregation and discontinuous, finer Laves particles in the interdendritic regions compared to that of the conventional constant current GTA weld metal. This process yielded better ageing response and improved high temperature mechanical properties of the weldments.

机译：通过采用不同的冷却技术研究了合金718的钨极氩弧焊（GTA）焊接过程中铌和Laves相形成的微偏析，得出的焊接冷却速率为43.2摄氏度/秒至508.7摄氏度/秒。焊缝冷却速度是通过改进的脉冲波形，氩气和氦气保护气体，铜散热器和液氮冷却的组合来实现的。与常规恒流GTA焊接金属相比，复合电流脉冲（CCP）波形与氦气屏蔽和液氮冷却的结合导致铌偏析和在枝晶间区域的不连续，更细的Laves颗粒更少。此过程产生了更好的时效响应并改善了焊件的高温机械性能。

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来源
《Materials at High Temperatures》 |2016年第3期|共13页
作者
Manikandan S. G. K.; Sivakumar D.; Kamaraj M.;
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正文语种 eng
中图分类工程材料学;
关键词
Alloy 718; GTA weld; Liquid nitrogen; Laves phase; Tensile strength; Direct ageing;

机译：718合金;GTA焊缝;液氮;Laves相;拉伸强度;直接时效;

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1. High temperature mechanical properties of cryogenically cooled alloy 718 weldments [J] . Manikandan S. G. K., Sivakumar D., Kamaraj M. Materials at High Temperatures . 2016,第3期

机译：低温冷却的718合金焊件的高温机械性能
2. Effect of Grain Size on the Mechanical Properties of Aluminum Alloy AA2219 Parent and Weldments at Ambient and Cryogenic Temperature [J] . Manwatkar Sushant K., Sunil M., Prabhu Antony, Transactions of the Indian Institute of Metals . 2019,第6期

机译：晶粒尺寸对环境和低温温度铝合金AA2219母材机械性能的影响
3. Effects of deep cryogenic treatment and low-temperature aging on the mechanical properties of friction-stir-welded joints of 2024-T351 aluminum alloy [J] . Ji Wang, Ruidong Fu, Yijun Li, Materials Science and Engineering . 2014,第jula15期

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4. Data Sheet Program and Mechanical Properties of Ti-5Al-2.5Sn ELI and Alloy 718 at Cryogenic Temperatures [C] . T. Ogata, T. Yuri, H. SUmiyoshi, International Cryogenic Materials Conference . 2004

机译：在低温温度下Ti-5Al-2.5sn Eli和合金718的数据表编程和机械性能
5. An investigation of the microstructure and properties of a cryogenically mechanically alloyed polycarbonate-poly(ether ether ketone) system. [D] . Martin, Julie Patricia. 2001

机译：低温机械合金化聚碳酸酯-聚醚醚酮体系的微观结构和性能研究。
6. Dataset for microstructure and mechanical properties of (CrCoNi)97Al1.5Ti1.5 medium entropy alloy twisted by free-end-torsion at room and cryogenic temperatures [O] . Yinglong Zhao, Ning Guo, Shiteng Long, 2020

机译：用于微观结构和机械性能的数据集（CRCONI）97Al1.5Ti1.5中等熵合金在室内和低温温度下由自由端扭转扭曲的中等熵合金
7. Correction to: Structure and magnetic properties of mechanically alloyed nanocrystalline Fe-46 at. Co-34 at. Ni-20 at. alloy powder from cryogenic to elevated temperatures [O] . Ganesh Varma Thotakura, Anuj Rathi, Tanjore V. Jayaraman 2019

机译：校正：机械合金纳米晶Fe-46的结构和磁性。％Co-34。％Ni-20。％合金粉末来自低温至升高的温度
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机译：铝 - 铜 - 锂合金的焊接机械性能，2090，在环境温度和低温下。

High temperature mechanical properties of cryogenically cooled alloy 718 weldments

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