scholarly journals Anisotropic Plastic Behavior of Additively Manufactured PH1 Steel

2021 ◽  
Author(s):  
Wenqi Liu ◽  
Zinan Li ◽  
Sven Bossuyt ◽  
Antti Forsström ◽  
Zaiqing Que ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Plastic Deformation ◽  
Thermal History ◽  
Deformation Behavior ◽  
Uniaxial Tensile ◽  
Plastic Behavior ◽  
Geometrical Shape ◽  
Anisotropic Plasticity ◽  
Plastic Deformation Behavior ◽  
Anisotropic Plastic

Metals made by additive manufacturing (AM) have intensely augmented over the past decade for customizing complex structured products in the aerospace industry, automotive, and biomedical engineering. However, for AM fabricated steels, the correlation between the microstructure and mechanical properties is yet a challenging task with limited reports. To realize optimization and material design during the AM process, it is imperative to understand the influence of the microstructural features on the mechanical properties of AM fabricated steels. In the present study, three material blocks with 120×25×15 mm3 dimensions are produced from PH1 steel powder using powder bed fusion (PBF) technology to investigate the anisotropic plastic deformation behavior arising from the manufacturing process. Despite being identical in geometrical shape, the manufactured blocks are designed distinguishingly with various coordinate transformations, i.e. alternating the orientation of the block in the building direction (z) and the substrate plate (x, y). Uniaxial tensile tests are performed along the length direction of each specimen to characterize the anisotropic plastic deformation behavior. The distinctly anisotropic plasticity behavior in terms of strength and ductility are observed in the AM PH1 steel, which is explained by their varied microstructure affected by the thermal history of blocks. It could also be revealed that the thermal history in the AM blocks is influenced by the block geometry even though the same process parameters are employed.

Plastic Deformation Behavior of Ni3X(X=Nb, Ti, Sn) Type HCP-Based Intermetallics with the Geometrically Close-Packed Structure

2002 ◽  
Vol 753 ◽  
Author(s):  
Koji Hagihara ◽  
Takayoshi Nakano ◽  
Yukichi Umakoshi
Keyword(s):  
Plastic Deformation ◽  
Basal Plane ◽  
Deformation Behavior ◽  
Plastic Behavior ◽  
Close Packed Structure ◽  
Plastic Deformation Behavior ◽  
Deformation Behaviors ◽  
Packed Structure ◽  
Characteristic Features ◽  
Similarity And Difference

ABSTBACTIn this paper, our recent results on the plastic deformation behaviors of Ni3X-type hcp-based GCP compounds, such as D0a-Ni3Nb, D019-Ni3Sn and D024-Ni3Ti, are summarized. The similarity and difference of their plastic behavior are discussed focusing on the correlation with the characteristic features of their crystal structures. The criterion for the occurrence of yield stress anomaly (YSA) by slip on the basal plane is also discussed.

Multiaxial Stress Tests on Lightweight Materials in Support of Material Modeling and Accurate Sheet Forming Simulations

2014 ◽  
Author(s):  
Toshihiko Kuwabara
Keyword(s):  
Plastic Deformation ◽  
Deformation Behavior ◽  
Predictive Accuracy ◽  
Mechanical Test ◽  
Multiaxial Stress ◽  
Material Models ◽  
Plastic Deformation Behavior ◽  
Anisotropic Plastic ◽  
Forming Simulations ◽  
Forming Defects

This presentation is a review of mechanical test methods for accurately measuring the anisotropic plastic deformation behavior of metal sheets and tubes subjected to multiaxial stress states. Special attention is given to the measurement and modeling of the anisotropic plastic deformation behavior of lightweight metals commonly used in industry and to the validation of the material models based on anisotropic yield functions for large plastic strain ranges. The effects of the material models used in the metal forming simulations on the improvement of the predictive accuracy for forming defects are also discussed.

Temperature-Dependent Plastic Deformation Behavior of Cu-Ni Alloys: Coupled Influence of Stacking Fault Energy and Short Range Clustering

2019 ◽  
Vol 294 ◽  
pp. 98-103
Author(s):  
Ying Wang ◽  
Dong Han ◽  
Xiao Wu Li
Keyword(s):  
Plastic Deformation ◽  
Deformation Behavior ◽  
Short Range ◽  
Stacking Fault ◽  
Stacking Fault Energy ◽  
Dynamic Strain ◽  
Uniaxial Tensile ◽  
Ni Alloys ◽  
Plastic Deformation Behavior ◽  
Different Temperatures

The uniaxial tensile tests were conducted at different temperatures to explore the coupled influence of stacking fault energy (SFE) and short-range clustering (SRC) on the plastic deformation behavior of Cu-Ni alloys. The results demonstrate that the ultimate tensile strength and uniform elongation decrease with increasing temperature due to the competitive influence of SFE and SRC. Dynamic strain aging (DSA) effect is observed at 200 and 250°C, and such an effect becomes more notable with increasing Ni content. The occurrence of DSA effect is thought to be caused by pinning of moving dislocations by SRC and diffusing solute atoms. The plastic deformation mechanisms for Cu-Ni alloys is mainly governed by wavy slip of dislocations at different temperatures, since the SFE of Cu-Ni alloys are very high especially at high temperatures, and the effect of SRC can be nearly ignored.

scholarly journals Investigation of Mechanical Properties and Plastic Deformation Behavior of (Ti45Cu40Zr10Ni5)100−xAlxMetallic Glasses by Nanoindentation

2014 ◽  
Vol 2014 ◽  
pp. 1-5
Author(s):  
Lanping Huang ◽  
Xuzhe Hu ◽  
TaoTao Guo ◽  
Song Li
Keyword(s):  
Mechanical Properties ◽  
Plastic Deformation ◽  
Elastic Modulus ◽  
Amorphous Alloy ◽  
Deformation Behavior ◽  
Alloy Composition ◽  
Loading Rate ◽  
Al Content ◽  
Plastic Deformation Behavior ◽  
Al Addition

The effect of Al addition on mechanical properties and plastic deformation behavior of (Ti45Cu40Zr10Ni5)100−xAlx(x= 0, 2, 4, 6 and 8) amorphous alloy ribbons have been investigated by nanoindentation. The hardness and elastic modulus do not simply increase with the increase of Al content. The alloy with 8 at.% Al exhibits the highest hardness and elastic modulus. The serrations or pop-in events are strongly dependent on the loading rate and alloy composition.

scholarly journals Mechanical properties and plastic deformation behavior of severely deformed pure Fe

2018 ◽  
Vol 15 ◽  
pp. 1495-1501 ◽  
Author(s):  
Nozomu Adachi ◽  
Hirokazu Sato ◽  
Yoshikazu Todaka ◽  
Takuya Suzuki
Keyword(s):  
Mechanical Properties ◽  
Plastic Deformation ◽  
Deformation Behavior ◽  
Plastic Deformation Behavior

Anisotropic Behavior in Plasticity and Ductile Fracture of an Aluminum Alloy

2015 ◽  
Vol 651-653 ◽  
pp. 163-168 ◽  
Author(s):  
Yan Shan Lou ◽  
Jeong Whan Yoon
Keyword(s):  
Plastic Deformation ◽  
Aluminum Alloy ◽  
Ductile Fracture ◽  
Stress Triaxiality ◽  
Tensile Tests ◽  
Uniaxial Tensile ◽  
Anisotropic Plasticity ◽  
Dog Bone ◽  
Associate Flow Rule ◽  
Anisotropic Plastic

Anisotropic mechanical behavior is investigated for an aluminum alloy of 6K21-IH T4 both in plastic deformation and ductile fracture. Anisotropic plastic deformation is characterized by uniaxial tensile tests of dog-bone specimens, while anisotropy in ductile fracture is illustrated with specimens with a central hole, notched specimens and shear specimens. All these specimens are cut off at every 15º from the rolling direction. The r-values and uniaxial tensile yield stresses are measured from the tensile tests of dog-bone specimens. Then the anisotropic plasticity is modeled by a newly proposed J2-J3 criterion under non-associate flow rule (non-AFR). The testing processes of specimens for ductile fracture analysis are simulated to extract the maximum plastic strain at fracture strokes as well as the evolution of the stress triaxiality and the Lode parameter in different testing directions. The measured fracture behavior is described by a shear-controlled ductile fracture criterion proposed by Lou et al. (2014. Modeling of shear ductile fracture considering a changeable cut-off value for stress triaxiality. Int. J. Plasticity 54, 56-80) for different loading directions. It is demonstrated that the anisotropic plastic deformation is described by the J2-J3 criterion with high accuracy in various loading conditions including shear, uniaxial tension and plane strain tension. Moreover, the anisotropy in ductile fracture is not negligible and cannot be modeled by isotropic ductile fracture criteria. Thus, an anisotropic model must be proposed to accurately illustrate the directionality in ductile fracture.

scholarly journals The Mechanical Properties of Granite under Ultrasonic Vibration

2019 ◽  
Vol 2019 ◽  
pp. 1-11
Author(s):  
Yu Zhou ◽  
Qiongqiong Tang ◽  
Shulei Zhang ◽  
Dajun Zhao
Keyword(s):  
Mechanical Properties ◽  
Plastic Deformation ◽  
Ultrasonic Vibration ◽  
Deformation Behavior ◽  
Hard Rock ◽  
Strain Gauges ◽  
Ultrasonic Vibrations ◽  
Plastic Deformation Behavior ◽  
Granite Samples ◽  
Experimental Stage

The new technique of using ultrasonic vibration to break hard rock is still in the experimental stage, but it has significant potential for improving the efficiency of hard rock crushing. We have analyzed the mechanical properties of granite under ultrasonic vibration and the characteristics of the damage produced. This was achieved by using an ultraloading device to apply continuous and discontinuous ultrasonic vibrations, respectively, to 32 mm diameter and 72 mm high granite samples. An ultradynamic data acceptor combined with strain gauges was used to monitor the strain of the granite in real time, and the elastic-plastic deformation behavior of the granite under ultrasonic vibration was observed. The results of this experiment indicate that the granite samples underwent elastic deformation, plastic deformation, and damage during this process. The samples first experienced compressive deformation with no obvious rupturing. As the vibration continued, the deformation finally became tensile, and significant fragmentation occurred. The mechanical properties of granite under ultrasonic vibration are analyzed in detail on the basis of these results, and the basis for selecting a vibration frequency is discussed.

Role of the Microstructure on the Deformation Behavior in Mg12ZnY with a Long-Period Stacking Ordered Structure

2008 ◽  
Vol 1128 ◽  
Author(s):  
Koji Hagihara ◽  
Naoyuki Yokotani ◽  
Akihito Kinoshita ◽  
Yuya Sugino ◽  
Hiroyuki Yamamoto ◽  
...  
Keyword(s):  
Plastic Deformation ◽  
Deformation Behavior ◽  
Hexagonal Structure ◽  
Rhombohedral Structure ◽  
Plastic Behavior ◽  
Long Period ◽  
Lpso Structure ◽  
Plastic Deformation Behavior ◽  
Deformation Modes

AbstractThe influence of a heat-treatment on the plastic deformation behavior in Mg12ZnY with a long-period stacking ordered (LPSO) structure was investigated by using crystals grown by the Bridgman method. Annealing of the crystal at 798 K for 3 days induced the change in the crystal structure of Mg12ZnY from the 18-fold rhombohedral structure (18R) to the 14-fold hexagonal structure (14H). The plastic behavior of those LPSO crystals showed a large variation depending on the loading axis in both crystals, because of the limitation of operative deformation modes in them. The change in the stacking sequence in the LPSO crystals did not show a large influence on the plastic deformation behavior at room temperature.

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