A novel pathway for multiscale high-resolution time-resolved residual stress evaluation of laser-welded Eurofer97.
A novel pathway for multiscale high-resolution time-resolved residual stress evaluation of laser-welded Eurofer97.
复制标题
DOI：
10.1126/sciadv.abl4592
复制
发表时间：
2022-02-18
期刊：
影响因子：
13.6
通讯作者：
Sui T
中科院分区：
文献类型：
--
作者：
Zhu B;Wang Y;Dluhoš J;London AJ;Gorley M;Whiting MJ;Sui T
未来聚变反应堆的面向等离子体的部件，其中Eurofer 97是主要的结构材料，将通过激光焊接技术组装。焊接过程中产生的非均匀残余应力会与接头组织发生相互作用，导致接头力学性能下降，寿命缩短。在这里，一个与数字图像相关（PFIB-DIC）和纳米压痕等离子体聚焦离子束被用来揭示残余应力，显微组织和显微硬度之间的机械连接。本研究是第一次使用PFIB-DIC来评估时间分辨的多尺度残余应力在几十微米的长度尺度的激光焊接Eurofer 97。观察到非平衡微观残余应力，这有助于宏观残余应力。熔合区和热影响区（HAZ）的显微硬度相似，尽管HAZ表现出约30%的拉伸残余应力软化。结果提供了深入了解，以保持结构完整性，这一关键的工程挑战。多尺度，高分辨率和时间分辨的残余应力定量激光焊接Eurofer 97聚变反应堆钢。
The plasma-facing components of future fusion reactors, where the Eurofer97 is the primary structural material, will be assembled by laser-welding techniques. The heterogeneous residual stress induced by welding can interact with the microstructure, resulting in a degradation of mechanical properties and a reduction in joint lifetime. Here, a Xe+ plasma focused ion beam with digital image correlation (PFIB-DIC) and nanoindentation is used to reveal the mechanistic connection between residual stress, microstructure, and microhardness. This study is the first to use the PFIB-DIC to evaluate the time-resolved multiscale residual stress at a length scale of tens of micrometers for laser-welded Eurofer97. A nonequilibrium microscale residual stress is observed, which contributes to the macroscale residual stress. The microhardness is similar for the fusion zone and heat-affected zone (HAZ), although the HAZ exhibits around ~30% tensile residual stress softening. The results provide insight into maintaining structural integrity for this critical engineering challenge. Multiscale, high resolution and time-resolved residual stress is quantified in laser-welded Eurofer97 fusion reactor steel.
登录
查看更多内容
影响因子：
3.1
作者：
Coppola, R.;Asserin, O.;Diegele, E.
通讯作者：
Diegele, E.
影响因子：
1.7
作者：
Hughes, D. J.;Koukovini-Platia, E.;Heeley, E. L.
通讯作者：
Heeley, E. L.
影响因子：
3
作者：
Korsunsky, Alexander M.;Sebastiani, Marco;Bemporad, Edoardo
通讯作者：
Bemporad, Edoardo
影响因子：
2.2
作者：
Burnett, T. L.;Kelley, R.;Withers, P. J.
通讯作者：
Withers, P. J.
影响因子：
9.4
作者：
Haratian, Saber;Niessen, Frank;Somers, Marcel A. J.
通讯作者：
Somers, Marcel A. J.