金丹,龙浩跃,韩高枫,金铠.Haynes230镍基合金的高温拉伸变形行为[J].稀有金属材料与工程,2022,51(8):3013~3017.[JIN Dan,LONG Haoyue,HAN Gaofeng,JIN Kai.High Temperature Tensile Deformation Behavior of Haynes230 Nickel Base Superalloy[J].Rare Metal Materials and Engineering,2022,51(8):3013~3017.]
Haynes230镍基合金的高温拉伸变形行为
投稿时间:2021-07-16  修订日期:2021-07-29
中文关键词:  Haynes230镍基合金  抗拉强度  动态应变时效  晶粒取向
基金项目:国家自然科学基金项目(面上项目,重点项目,重大项目),辽宁省自然科学基金项目
中文摘要:
      针对Haynes230镍基合金进行了不同温度下的拉伸实验,采用电子背散射衍射(Electron Backscattered Diffraction,EBSD)技术研究了该材料高温下的拉伸变形行为的微观机理。研究表明:Haynes材料在800℃以内有较高的抵抗塑性变形的能力;650℃温度下,材料表现出了明显的动态应变时效(Dynamic Strain Aging,DSA)现象,700℃和800℃下的DSA效应相差不多,760℃下的DSA效应最弱。DSA效应的强化作用,使得650℃下合金仍保持较高的强度,且800℃抗拉强度与760℃的相比下降不多。EBSD结果表明,室温下断口附近组织出现了大量的变形孪晶,晶粒取向以<111>为主;650℃下断口附近组织的<111>取向特征更为明显,且晶界发生了弯曲变形,对位错运动的阻力增加;随着温度增加,断口附近在晶间和晶内均出现了动态再结晶晶粒。
High Temperature Tensile Deformation Behavior of Haynes230 Nickel Base Superalloy
英文关键词:Haynes230 nickel base superalloy  Tensile Strength  DSA  Grain Orientation
英文摘要:
      Tensile experiments were conducted at different temperatures for the Haynes 230 nickel-based alloy, and the microscopic mechanism of the tensile deformation behavior at high temperatures was investigated using Electron Backscattered Diffraction (EBSD) technique.It is shown that Haynes materials have a high resistance to plastic deformation until 800℃. At 650℃, the materials show a significant dynamic strain aging (DSA) phenomenon, and the DSA effect is similar at 700℃ and 800℃, and the DSA effect is weakest at 760℃.The strengthening effect of DSA effect makes the alloy still maintain high strength at 650℃, and the tensile strength at 800℃ does not decrease much compared with that at 760℃.The EBSD results show that a large number of deformed twins appear near the fracture at room temperature, and the grain orientation is dominated by <111>; the <111> orientation of the tissue near the fracture is more obvious at 650℃, and the grain boundaries are bent and deformed, which increases the resistance to dislocation movement; with the increase of temperature, dynamic recrystallization grains appear in the intergranular and intracrystalline areas near the fracture.
作者单位E-mail
金丹 沈阳化工大学 jindan1976@syuct.edu.cn 
龙浩跃 沈阳化工大学 467193030@qq.com 
韩高枫 沈阳化工大学  
金铠 沈阳化工大学  
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