scholarly journals Impact of Short-Range Clustering on the Multistage Work-Hardening Behavior in Cu–Ni Alloys

Metals ◽  
2019 ◽  
Vol 9 (2) ◽  
pp. 151 ◽  
Author(s):  
Dong Han ◽  
Jin-Xian He ◽  
Xian-Jun Guan ◽  
Yan-Jie Zhang ◽  
Xiao-Wu Li
Keyword(s):  
Work Hardening ◽  
Short Range ◽  
Strain Range ◽  
Work Hardening Behavior ◽  
Hardening Behavior ◽  
Ni Alloys ◽  
Hardening Process ◽  
Ni Content ◽  
Ni Alloy ◽  
Work Hardening Rate

The work-hardening behavior of Cu–Ni alloys with high stacking-fault energies (SFEs) is experimentally investigated under uniaxial compression. It is found that, with the increase of Ni content (or short-range clustering, SRC), the flow stress of Cu–Ni alloys is significantly increased, which is mainly attributed to an enhanced contribution of work-hardening. An unexpected multistage (including Stages A, B, and C) work-hardening process was found in this alloy, and such a work-hardening behavior is essentially related to the existence of SRC structures in alloys. Specifically, during deformation in Stage B (within the strain range of 0.04–0.07), the forming tendency to planar-slip dislocation structures becomes enhanced with an increase of SRC content (namely, increase of Ni content), leading to the occurrence of work-hardening rate recovery in the Cu–20at.% Ni alloy. In short, increasing SRC in the Cu–Ni alloy can trigger an unexpected multistage work-hardening process, and thus improve its work-hardening capacity.

Effect of Carbon on Work Hardening Behavior of 18%Ni Martensitic Steel

2007 ◽  
Vol 539-543 ◽  
pp. 4783-4788 ◽  
Author(s):  
Koichi Nakashima ◽  
Y. Fujimura ◽  
Toshihiro Tsuchiyama ◽  
Setsuo Takaki
Keyword(s):  
Dislocation Density ◽  
Cold Rolling ◽  
Work Hardening ◽  
Tensile Deformation ◽  
Bearing Steel ◽  
Martensitic Steels ◽  
Work Hardening Behavior ◽  
Hardening Behavior ◽  
Work Hardening Rate ◽  
Ultralow Carbon

The behavior of work hardening by cold rolling and tensile deformation was investigated in an ultralow carbon and carbon bearing martensitic steels, and then the effect of carbon on the work hardening behavior was discussed in terms of the change in dislocation density and the microstructure development during deformation. In the ultralow carbon 18%Ni steel (20ppmC), the hardness is almost constant irrespective of the reduction ratio. On the other hand, the carbon bearing 18%Ni steel (890ppmC) exhibits marked work hardening. The dislocation density of these specimens was confirmed to be never increased by cold rolling. It was also found that 10% cold rolling gives no significant influence on the morphology of martensite packet and block structure. TEM images of the 10% cold-rolled steels revealed that the martensite laths in the ultralow carbon steel are partially vanished, while those in the carbon bearing steel are stably remained. These results indicate that the solute carbon retards the movement of dislocations, which results in the high work hardening rate through the formation of fine dislocation substructure within laths.

Stir zone anisotropic work hardening behavior in friction stir processed EN8 medium carbon steel

2020 ◽  
pp. 140582
Author(s):  
Md Anwar Ali Anshari ◽  
Murshid Imam ◽  
Mohd Zaheer Khan Yusufzai ◽  
Viswanath Chinthapenta ◽  
Rajnish Mishra
Keyword(s):  
Carbon Steel ◽  
Work Hardening ◽  
Medium Carbon Steel ◽  
Stir Zone ◽  
Medium Carbon ◽  
Work Hardening Behavior ◽  
Friction Stir ◽  
Hardening Behavior

scholarly journals Machining-Induced Work Hardening Behavior of Inconel 718 Considering Edge Geometries

Materials ◽  
2022 ◽  
Vol 15 (2) ◽  
pp. 397
Author(s):  
Bin Zhou ◽  
Weiwei Zhang ◽  
Zhongmei Gao ◽  
Guoqiang Luo
Keyword(s):  
Grain Size ◽  
Work Hardening ◽  
Inconel 718 ◽  
Orthogonal Cutting ◽  
Chip Thickness ◽  
Machined Surface ◽  
Work Hardening Behavior ◽  
Hardening Behavior ◽  
Significant Difference ◽  
Optimization Of Cutting Parameters

As a representative type of superalloy, Inconel 718 is widely employed in aerospace, marine and nuclear industries. The significant work hardening behavior of Inconel 718 can improve the service performance of components; nevertheless, it cause extreme difficulty in machining. This paper aims to investigate the influence of chamfered edge parameters on work hardening in orthogonal cutting of Inconel 718 based on a novel hybrid method, which integrates Coupled Eulerian-Lagrangian (CEL) method and grain-size-based functions considering the influence of grain size on microhardness. Orthogonal cutting experiments and nanoindentation tests are conducted to validate the effectiveness of the proposed method. The predicted results are highly consistent with the experimental results. The depth of work hardening layer increases with increasing chamfer angle and chamfer width, also with increasing feed rate (the uncut chip thickness). However, the maximum microhardness on the machined surface does not exhibit a significant difference. The proposed method can provide theoretical guidance for the optimization of cutting parameters and improvement of the work hardening.

Influence of Zn addition on the microstructure, tensile properties and work-hardening behavior of Mg-1Gd alloy

2020 ◽  
Vol 772 ◽  
pp. 138779 ◽  
Author(s):  
Jun Zhao ◽  
Bin Jiang ◽  
Yuan Yuan ◽  
Aitao Tang ◽  
Haoran Sheng ◽  
...  
Keyword(s):  
Tensile Properties ◽  
Work Hardening ◽  
Work Hardening Behavior ◽  
Hardening Behavior ◽  
Zn Addition

Localized Deformation of Equal Channel Angular Extruded Aluminum

2005 ◽  
Vol 475-479 ◽  
pp. 425-428 ◽  
Author(s):  
Fuqian Yang ◽  
Lingling Peng ◽  
Kenji Okazaki
Keyword(s):  
Work Hardening ◽  
Deformation Behavior ◽  
Master Curve ◽  
Localized Deformation ◽  
Stress Strain ◽  
Work Hardening Behavior ◽  
Hardening Behavior ◽  
Similar Work

The localized deformation behavior of annealed Al and Al severely deformed by ECAE process was determined by using microindentation test. Using the method proposed by Tabor, the indentation stress-strain curves of annealed Al and as-ECAE deformed Al were constructed, which display similar work-hardening behavior. For annealed Al, the altitude of the indentation stressstrain curves is a function of the indenter size. A master curve then is constructed, which displays different work-hardening behavior. For the ECAE deformed Al, the indentation stress-strain curves are independent of the indenter size, suggesting that the microstructure inside the as-ECAE deformed Al is different from the annealed Al.

Sign in / Sign up

Export Citation Format

Share Document