Perspective on hetero-deformation induced (HDI) hardening and back stress

被引：1151
作者：
Zhu, Yuntian [1 ,2 ]
Wu, Xiaolei [3 ,4 ]
机构：
[1] Nanjing Univ Sci & Technol, Sch Mat Sci & Engn, Nano & Heterogeneous Mat Ctr, Nanjing, Jiangsu, Peoples R China
[2] North Carolina State Univ, Dept Mat Sci & Engn, Raleigh, NC 27695 USA
[3] Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing, Peoples R China
[4] Univ Chinese Acad Sci, Sch Engn Sci, Beijing, Peoples R China
来源：
MATERIALS RESEARCH LETTERS | 2019年 / 7卷 / 10期
基金：
国家重点研发计划;
关键词：
Heterostructured materials; strain gradient; back-stress; forward stress; hetero-deformation induced (HDI) hardening; RANGE INTERNAL-STRESSES; HIGH-TENSILE DUCTILITY; MECHANICAL-PROPERTIES; FLOW-STRESS; BAUSCHINGER; STRAIN; DISLOCATION; STEEL; STRENGTH; COPPER;
D O I：
10.1080/21663831.2019.1616331
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Heterostructured materials have been reported as a new class of materials with superior mechanical properties, which was attributed to the development of back stress. There are numerous reports on back stress theories and measurements with no consensus. Back stress is developed in soft domains to offset the applied stress, making them appear stronger, while forward stress is developed to make hard domains appear weaker. The extra hardening in heterostructured materials is resulted from interactions between back stresses and forward stresses, and should be described as hetero-deformation induced (HDI) hardening and the measured 'back stress' should be renamed HDI stress. [GRAPHICS] . IMPACT STATEMENT The 'back stress' hardening in the literature can be described more accurately as hetero-deformation induced (HDI) hardening and the measured 'back stress' should be renamed HDI stress.
引用
收藏
页码：393 / 398
页数：6
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