Electron Beam Welding of Hot-Rolled Fe-Mn-Al-Ni Shape Memory Alloy Sheets

被引：6
作者：
Bauer, A. [1 ]
Wiegand, M. [2 ]
Wicke, P. [1 ]
Sommer, N. [2 ]
Vollmer, M. [1 ]
Boehm, S. [2 ]
Niendorf, T. [1 ]
机构：
[1] Univ Kassel, Inst Mat Engn, D-34125 Kassel, Germany
[2] Univ Kassel, Dept Cutting & Joining Mfg Proc, D-34125 Kassel, Germany
来源：
SHAPE MEMORY AND SUPERELASTICITY | 2023年 / 9卷 / 02期
关键词：
Fe-Mn-Al-Ni; SMA; Vacuum electron beam welding; Preheating; Abnormal grain growth; Superelasticity; Pseudoelasticity; ABNORMAL GRAIN-GROWTH; CIVIL ENGINEERING STRUCTURES; RECOVERY STRESS FORMATION; FEMNALNI SINGLE-CRYSTALS; CYCLIC HEAT-TREATMENT; SUPERELASTIC RESPONSE; CRYSTALLOGRAPHIC ORIENTATION; TRANSFORMATION; TENSION; STRIPS;
D O I：
10.1007/s40830-023-00432-2
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The present study focuses on the weldability of hot-rolled Fe-Mn-Al-Ni shape memory alloy sheets by vacuum electron beam welding. Tailored process-specific welding parameters, such as preheating with electron beam or beam oscillation during welding, allowed defect-free joining with very thin weld seams and heat-affected zones. By applying a post-weld cyclic heat treatment, abnormal grain growth can be promoted across the weld seams. However, regardless of the selected welding parameters, some specimens are characterized by the formation of smaller grains within the former fusion zone. In situ incremental strain tests reveal that the former fusion zone has only a minor influence on the functional properties and is not responsible for structural failure. Thus, electron beam welding is a promising welding technology for joining Fe-Mn-Al-Ni shape memory alloys.
引用
收藏
页码：364 / 376
页数：13
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