Ultrahigh damping and Young's modulus softening due to a/b twins in 10M Ni-Mn-Ga martensite

被引：8

作者：

Kustov, S. ^{[1
]}

Saren, A. ^{[2
]}

Sozinov, A. ^{[2
]}

Kaminskii, V. ^{[3
]}

Ullakko, K. ^{[2
]}

机构：

[1] Univ Illes Balears, Cra Valldemossa Km 7-5, Palma de Mallorca 07122, Spain

[2] Lappeenranta Univ Technol, Mat Phys Lab, Yliopistonkatu 34, Lappeenranta 53850, Finland

[3] ITMO Univ, Kronverkskiy Ave 49, St Petersburg 191101, Russia

来源：

SCRIPTA MATERIALIA | 2020年 / 178卷

关键词：

INTERNAL-FRICTION; ALLOYS; STRESS;

D O I：

10.1016/j.scriptamat.2019.12.024

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

We study Young's modulus and damping of IOM martensite in Ni50.0Mn28.4Ga21.6 magnetic shape memory alloy using a sample without a/c twin boundaries (TBs) and maximum or zero shear stress in a/b twinning planes. Damping is similar to 300 times higher and modulus similar to 3.5 times lower when shear stress acts on a/b TBs. Ultrahigh damping and low modulus are insensitive to magnetic field, show strong strain amplitude nonlinearity and are attributed to stress-induced motion of a regular system of mobile a/b TBs. Near the reverse transformation, E-001 modulus without contribution of TBs is similar to 10 times higher than reported previously for 10M polyvariant sample. (C) 2019 Acta Materialia Inc. Published by Elsevier Ltd.

引用

页码：483 / 488

页数：6

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