Ultra-high mechanical damping during superelastic bending of micro pillars and micro beams in Cu-Al-Ni shape memory alloys

材料科学 纳米压痕 聚焦离子束 形状记忆合金 弯曲 扭转(腹足类) 复合材料 形状记忆合金* 悬臂梁 数学 量子力学 医学 组合数学 物理 外科 离子
作者
J. San Juán,Jose F. Gómez‐Cortés,M.L. Nó
出处
期刊:Journal of Alloys and Compounds [Elsevier BV]
卷期号:929: 167307-167307 被引量:5
标识
DOI:10.1016/j.jallcom.2022.167307
摘要

Mechanical spectroscopy techniques and internal friction measurements have historically offered a key contribution to the understanding of fundamental mechanisms of defects mobility and phase transformations in many kinds of materials. Nowadays, at the beginning of the millennium, the apparition of the new paradigm of nanotechnology reveals new unforeseen properties of the materials at the nano-scale. Nevertheless, instrumented nanoindentation appears as a new mechanical spectroscopy technique to approach the measure of internal friction at the nano-scale through the direct evaluation of the loss factor η. Indeed, nano compression tests on micro and nano pillars recently measured ultra-high mechanical damping in several Cu-based shape memory alloys (SMA). A step forward is given in the present work, approaching the design of potential micro dampers of SMA working in bending and torsion modes. Several micro devices were milled by focused ion beam (FIB) technique, on [001] oriented single crystals of a Cu-Al-Ni SMA. Ultra-high mechanical damping is demonstrated during superelastic bending of square section micro pillars by in-situ testing inside the scanning electron microscope, using a flat apex 60º-conical indenter in off-axis mode. Then, a series of micro beams and micro cantilevers were designed and milled by FIB, and tested using instrumented nanoindentation equipment by applying the load in bending mode as well as in a mixed bending-torsion mode during off-axis tests. In all cases, the internal friction, or mechanical damping per cycle and per unit of volume, was calculated from the measured load-displacement curve. Superelastic cycling during bending of micro pillars, micro beams and micro cantilevers, exhibits stable and reproducible ultra-high mechanical damping with a loss factor η > 0.1. These results paved the road for designing micro-dampers of Cu-based SMA, able to work in different mechanical modes of compression, bending and torsion, opening the way for many applications of mechanical damping at the nano-scale.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
PDF的下载单位、IP信息已删除 (2025-6-4)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
手拿大炮完成签到,获得积分10
刚刚
辛勤的毛毛完成签到 ,获得积分10
刚刚
9528保护我完成签到,获得积分10
1秒前
1秒前
归尘发布了新的文献求助10
1秒前
共享精神应助alho采纳,获得10
1秒前
3秒前
3秒前
Lucas应助Hazel采纳,获得10
4秒前
曾无忧应助奋斗的海豚采纳,获得10
5秒前
Xin_Tang完成签到,获得积分10
5秒前
李健应助qqq采纳,获得10
5秒前
5秒前
赫若魔应助Hhd采纳,获得10
5秒前
6秒前
英姑应助扯淡儿采纳,获得10
6秒前
6秒前
清脆语海发布了新的文献求助10
7秒前
李健应助合适阑悦采纳,获得10
7秒前
浮游应助细心的靖巧采纳,获得10
7秒前
明亮的寻芹完成签到,获得积分10
7秒前
Kiki完成签到 ,获得积分10
8秒前
橙子发布了新的文献求助20
8秒前
einspringen发布了新的文献求助10
8秒前
xiao发布了新的文献求助10
9秒前
打打应助吱吱吱吱在采纳,获得10
9秒前
十九完成签到,获得积分10
9秒前
Amos完成签到,获得积分10
10秒前
Xin_Tang发布了新的文献求助30
10秒前
左友铭发布了新的文献求助10
10秒前
xinxinqi完成签到 ,获得积分10
10秒前
10秒前
11秒前
11秒前
罐罐儿应助拼搏的金针菇采纳,获得10
11秒前
快乐一下发布了新的文献求助20
12秒前
科研通AI6应助Alex采纳,获得200
12秒前
量子星尘发布了新的文献求助10
13秒前
阿泽完成签到,获得积分10
13秒前
深情安青应助我不会积分采纳,获得30
13秒前
高分求助中
(应助此贴封号)【重要!!请各用户(尤其是新用户)详细阅读】【科研通的精品贴汇总】 10000
SOFT MATTER SERIES Volume 22 Soft Matter in Foods 1000
Zur lokalen Geoidbestimmung aus terrestrischen Messungen vertikaler Schweregradienten 1000
Storie e culture della televisione 500
Selected research on camelid physiology and nutrition 500
《2023南京市住宿行业发展报告》 500
Food Microbiology - An Introduction (5th Edition) 500
热门求助领域 (近24小时)
化学 医学 生物 材料科学 工程类 有机化学 内科学 生物化学 物理 计算机科学 纳米技术 遗传学 基因 复合材料 化学工程 物理化学 病理 催化作用 免疫学 量子力学
热门帖子
关注 科研通微信公众号,转发送积分 4884137
求助须知:如何正确求助?哪些是违规求助? 4169517
关于积分的说明 12937642
捐赠科研通 3929850
什么是DOI,文献DOI怎么找? 2156330
邀请新用户注册赠送积分活动 1174727
关于科研通互助平台的介绍 1079546