ON THE EFFECT OF INTERFACE THICKNESS ON SHAPE MEMORY AND SUPERELASTIC BEHAVIOR OF TINI
BI-LAYER COMPOSITE

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HOSSEINI NOORABADI SEPIDEH SADAT; NILI AHMADABADI MAHMOUD

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Journal: METALLURGICAL ENGINEERING Year:2017 | Volume:19 | Issue:4 (64) Page(s): 249-259

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Information Journal Paper

Title

ON THE EFFECT OF INTERFACE THICKNESS ON SHAPE MEMORY AND SUPERELASTIC BEHAVIOR OF TINI BI-LAYER COMPOSITE

Author(s)

HOSSEINI NOORABADI SEPIDEH SADAT | NILI AHMADABADI MAHMOUD | Issue Writer Certificate

Keywords

NITI ALLOYQ2

SHAPE MEMORYQ1

SUPERELASTICTYQ2

BI-LAYER COMPOSITEQ2

DIFFUSION BONDINGQ2

Abstract

NITI ALLOYs (SMAs) are unique alloys, which have two attractive properties, SHAPE MEMORY effect, super-elasticity and biocompatibility. Each property strongly depends on the composition, temperature and structure. To have SHAPE MEMORY and super elastic behavior at the same time, a BI-LAYER COMPOSITE, austenitic (A) /martensitic (M) NITI ALLOY was designed and made to investigate the properties. Layers with2: 1 ratio (M: A) were bonded under DIFFUSION BONDING process in vacuum tube furnace at 1000⁰C, for 3 hours under 20 MPa compressive stress. To evaluate the effect of interface zone on the properties, specimens were annealed in vacuum tube furnace at1000 ⁰C for 5 and 10 hours. The interface was investigated by optical microscopy, and chemical composition gradient in the interface zone was analyzed using line scan analysis with energy dispersive X-ray spectroscopy. Mechanical properties of the interface zone were studied using micro-hardness measurements. The SHAPE MEMORY and super elastic behavior of bi-layer were investigated using loading-unloading test and in-situ thermal heating by applying electrical current. The results depicted that annealing time has significant effect on the width of interface zone, and thus a microstructural gradient has been developed, within the thickness of the specimen. It was found that the bi-layer specimens could act as a functionally graded material due to their chemical composition gradients that is desirable for better controllability in actuation applications.

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APA: Copy

HOSSEINI NOORABADI, SEPIDEH SADAT, & NILI AHMADABADI, MAHMOUD. (2017). ON THE EFFECT OF INTERFACE THICKNESS ON SHAPE MEMORY AND SUPERELASTIC BEHAVIOR OF TINI BI-LAYER COMPOSITE. METALLURGICAL ENGINEERING, 19(4 (64) ), 249-259. SID. https://sid.ir/paper/112378/en

Vancouver: Copy

HOSSEINI NOORABADI SEPIDEH SADAT, NILI AHMADABADI MAHMOUD. ON THE EFFECT OF INTERFACE THICKNESS ON SHAPE MEMORY AND SUPERELASTIC BEHAVIOR OF TINI BI-LAYER COMPOSITE. METALLURGICAL ENGINEERING[Internet]. 2017;19(4 (64) ):249-259. Available from: https://sid.ir/paper/112378/en

IEEE: Copy

SEPIDEH SADAT HOSSEINI NOORABADI, and MAHMOUD NILI AHMADABADI, “ON THE EFFECT OF INTERFACE THICKNESS ON SHAPE MEMORY AND SUPERELASTIC BEHAVIOR OF TINI BI-LAYER COMPOSITE,” METALLURGICAL ENGINEERING, vol. 19, no. 4 (64) , pp. 249–259, 2017, [Online]. Available: https://sid.ir/paper/112378/en

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