The influence of heat treatment on the thermomechanical response of Ni-rich NiTi alloys manufactured by selective laser melting

被引：223
作者：
Saedi, Soheil [1 ]
Turabi, Ali Sadi [1 ]
Andani, Mohsen Taheri [2 ,3 ]
Haberland, Christoph [2 ]
Karaca, Haluk [1 ]
Elahinia, Mohammad [2 ]
机构：
[1] Univ Kentucky, Dept Mech Engn, Lexington, KY 40506 USA
[2] Univ Toledo, Mech Ind & Mfg Engn Dept, Dynam & Smart Syst Lab, Toledo, OH 43606 USA
[3] Univ Michigan, Coll Engn, SM Wu Mfg Res Ctr, Dept Mech Engn, Ann Arbor, MI 48109 USA
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2016年 / 677卷
关键词：
Shape memory alloy; NiTi; Additive manufacturing; Selective laser melting; Superelastic NiTi; Heat treatments; PHASE-TRANSFORMATION BEHAVIOR; SHAPE-MEMORY; MARTENSITIC TRANSFORMATIONS; MECHANICAL-PROPERTIES; MICROSTRUCTURE; PRECIPITATION; TEMPERATURE; METALLURGY; PARAMETERS; SLM;
D O I：
10.1016/j.jallcom.2016.03.161
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
This study presents the effects of solution annealing and subsequent aging on shape memory response of Ni-rich Ni50.8Ti49.2 alloys fabricated by Selective Laser Melting. After solutionizing, samples were heat treated at selected times at 350 degrees C and 450 degrees C and their shape memory effect, superelasticity, and transformation temperatures were determined. It was found that transformation temperatures, transformation behavior, strength, and recoverable strain are highly heat treatment dependent. Samples aged at 350 degrees C showed better recovery in superelasticity tests where 350 degrees C-18 h aged samples exhibited almost perfect superelasticity with 95% recovery ratio with 5.5% strain in the first cycle and stabilized superelasticity with a recoverable strain of 4.2% after 10th cycle. Meanwhile, 450 degrees C-10 h aged sample exhibited 68% recovery with a recoverable strain of 4.2% in the first cycle and stabilized recoverable strain of 3.8% after 10th cycle. (C) 2016 Elsevier B.V. All rights reserved.
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页码：204 / 210
页数：7
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