The Work-Hardening Process in Metals

1969 ◽  
Vol 26 (2) ◽  
pp. 331-338 ◽  
Author(s):  
Hiroshi Fujita
Keyword(s):  
Work Hardening ◽  
Hardening Process

The Work Hardening of Single Phase and Multi-Phase Aluminium Alloys

2006 ◽  
Vol 519-521 ◽  
pp. 71-78 ◽  
Author(s):  
J. David Embury ◽  
Warren J. Poole ◽  
David J. Lloyd
Keyword(s):  
Work Hardening ◽  
Aluminium Alloys ◽  
Single Phase ◽  
Dynamic Recovery ◽  
Uniform Elongation ◽  
Strengthening Mechanisms ◽  
Plastic Response ◽  
Spring Back ◽  
Hardening Process ◽  
Multi Phase

The process of work hardening in aluminum alloys is important from the viewpoint of formability and the prediction of the properties of highly deformed products. However the complexity of the strengthening mechanisms in these materials means that one must carefully consider the interaction of dislocations with the detailed elements of the microstructure and the related influence of the elements on dislocation accumulation and dynamic recovery. In addition, it is necessary to consider the influence of the work hardening process at various levels of plastic strain. This permits the possibility of designing microstructure for tailored plastic response, e.g. not simply designed for yield strength but also considering uniform elongation, spring-back, ductility etc. This presentation will explore the concept of identifying the various interactions which govern the evolution of the work hardening and their possible role in alloy design.

scholarly journals The hardening of metals by rotating magnetic fields

1931 ◽  
Vol 130 (814) ◽  
pp. 514-523 ◽  
Keyword(s):  
Magnetic Field ◽  
Magnetic Fields ◽  
Work Hardening ◽  
Rotating Magnetic Fields ◽  
Hardening Process ◽  
Hard Steel ◽  
Steel Balls ◽  
Hardened Condition

In a previous paper by the author experiments were described in which the hardness of various metals was increased by rotating them in a magnetic field. It had been observed that metals in a work-hardened condition, and in particular hard steel which had been super-hardened by the “Cloudburst” process of bombardment with steel balls, exhibit a propensity to become still harder by a process of ageing, the spontaneous increase of hardness commencing with the termination of the work-hardening process, and contiuning during a period of several hours or days.

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.

Grain Size Dependence of the Work Hardening Process in Al99.99

2002 ◽  
Vol 194 (1) ◽  
pp. 3-18 ◽  
Author(s):  
I. Kov�cs ◽  
N.Q. Chinh ◽  
E. Kov�cs-Cset�nyi
Keyword(s):  
Grain Size ◽  
Work Hardening ◽  
Size Dependence ◽  
Hardening Process

Defects, Microstructure and Properties of the Industrial 35 CrMoV Steel

1990 ◽  
Vol 209 ◽  
Author(s):  
Wu Wangzi Wu Wangzi ◽  
Qiao Guiwen Qiao Guiwen
Keyword(s):  
Mechanical Properties ◽  
Solid Solution ◽  
Stress Concentration ◽  
Crack Propagation ◽  
Work Hardening ◽  
High Density ◽  
Metallographic Examination ◽  
Solid Solution Strengthening ◽  
Hardening Process ◽  
Solution Strengthening

ABSTRACT35 CrMoV steel is widely used in industries. To select the best technology for improving the mechanical properties, a series of heat treatments were tested. Metallographic examination indicates that the microstructure is a kind of non-typical bainite and, to a certain extent, similar to tempered troostites. TEM observation shows that rod-like alloying cementite distributed in ferrite grains laid parallel to each other and ultra-fine alloying carbides also dispersed in the lath-like ferrite grains. Moreover, there exists high density of dislocation tangles and microtwins. Detailed discussions are made on the solid solution strengthening, the work hardening process and the crack propagation by view of microstructure, defects and stress concentration.

Work Hardening and Textures in hcp Materials

2005 ◽  
Vol 495-497 ◽  
pp. 1597-1602 ◽  
Author(s):  
P. Sánchez ◽  
A. Pochettino
Keyword(s):  
Work Hardening ◽  
Texture Evolution ◽  
The Self ◽  
Prismatic Slip ◽  
Viscoplastic Model ◽  
Hardening Process ◽  
Self Consistent ◽  
Hcp Materials ◽  
Latent Hardening ◽  
Deformation Modes

An analysis of the hardening process in grains and its effect on texture development of hcp materials is performed. It corresponds to the cases of Zr and Zn, which present different c/a relationship and, consequently, their deformation modes and the associated activities are different. The self consistent viscoplastic model is used for the prediction of texture evolution Results show the importance of the self and latent hardening introduced by the prismatic slip in Zr and the latent hardening effects introduced by pyramidal <c+a> slip on compressive twinning in Zn.

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