Analysis of strain bursts during nanoindentation creep of high-density polyethylene

被引：9
作者：
Ghomsheh, Mohammad Zare [1 ]
Spieckermann, Florian [1 ]
Polt, Gerald [1 ]
Wilhelm, Harald [1 ,2 ]
Zehetbauer, Michael [1 ]
机构：
[1] Univ Vienna, Res Grp Phys Nanostruct Mat, Fac Phys, A-1090 Vienna, Austria
[2] Lab Polymer Engn LKT TGM, A-1200 Vienna, Austria
来源：
POLYMER INTERNATIONAL | 2015年 / 64卷 / 11期
基金：
奥地利科学基金会;
关键词：
nanoindentation; creep; dislocation avalanches; strain burst; polyethylene; DEFORMATION MECHANISMS; PLASTIC RESISTANCE; ELASTIC-MODULUS; INDENTATION; CRYSTALS; POLYMERS; HARDNESS; TRIBOLOGY; STRENGTH; FRICTION;
D O I：
10.1002/pi.4967
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Nanoindentation creep experiments on polyethylene were carried out in order to investigate dislocation-based plastic deformation mechanisms. Similarly to that reported in a recent paper (Li J and Ngan AHW, Scr Mater62:488-491 (2010)), discrete deformation processes occur during nanoindentation creep tests which again seem to arise from the break-off of dislocation avalanches. That interpretation is supported from systematic studies of the effect of variations of the loading rate and of the applied load on the number and the height of bursts. (c) 2015 Society of Chemical Industry
引用
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页码：1537 / 1543
页数：7
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