Multistage and High-speed Compression Testing Machine for Obtaining Flow Stress and Microstructure Evolution in Hot Forming of Steels

The strength to weight ratio and oxidation resistance of NiAl make this ordered intermetallic, with some modifications, an attractive candidate to compete with many superalloys for high temperature applications. Recent studies have shown that the inherent brittleness of many polycrystalline intermetallics can be overcome by micro and macroalloying. It has also been found that the high temperature mechanical properties of NiAl can be enhanced through the addition of Nb by powder metallurgical techniques forming a dispersed second phase through interdiffusion in a polycrystalline matrix. A drop in the flow stress is observed however in a NiAl-2 at.% Nb alloy after 0.2 % strain during constant strain rate hot compression testing at 1025°C. The object of this investigation was to identify the second phase and to determine the cause of the flow stress drop.

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MUSTANG-LC

Alloy Digest ◽

10.31399/asm.ad.ts0192 ◽

1967 ◽

Vol 16 (4) ◽

Keyword(s):

Physical Properties ◽

High Speed ◽

High Speed Steel ◽

Hot Extrusion ◽

Heat Treating ◽

Hot Forming ◽

Steel Company ◽

Extrusion Dies ◽

Die Life

Abstract Mustang-LC is a tungsten-molybdenum high-speed steel specially developed for hot work applications requiring long die life. It is recommended for hot forming and swaging dies, hot extrusion dies, hot punches, etc. This datasheet provides information on composition, physical properties, hardness, and elasticity. It also includes information on forming, heat treating, machining, and joining. Filing Code: TS-192. Producer or source: Jessop Steel Company.

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Whole process analysis of microstructure evolution during chip formation of high-speed machining OFHC copper

Journal of Manufacturing Processes ◽

10.1016/j.jmapro.2021.04.038 ◽

2021 ◽

Vol 66 ◽

pp. 470-482

Author(s):

Hongguang Liu ◽

Jun Zhang ◽

Binbin Xu ◽

Huijie Zhang ◽

Wanhua Zhao

Keyword(s):

Microstructure Evolution ◽

Chip Formation ◽

High Speed ◽

Process Analysis ◽

Ofhc Copper ◽

High Speed Machining ◽

Whole Process

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3-D Simulation of hot forming and microstructure evolution

Computational Materials Science ◽

10.1016/j.commatsci.2003.06.003 ◽

2003 ◽

Vol 28 (3-4) ◽

pp. 469-477 ◽

Cited By ~ 37

Author(s):

H Grass ◽

C Krempaszky ◽

T Reip ◽

E Werner

Keyword(s):

Microstructure Evolution ◽

Hot Forming

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Material data for the kinetics of microstructure evolution of Cr–Mo–V steel in hot forming

Journal of Materials Processing Technology ◽

10.1016/j.jmatprotec.2011.10.004 ◽

2012 ◽

Vol 212 (2) ◽

pp. 417-426 ◽

Cited By ~ 15

Author(s):

Mehdi Soltanpour ◽

Jun Yanagimoto

Keyword(s):

Microstructure Evolution ◽

Hot Forming ◽

Material Data ◽

Kinetics Of

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Influence of High Temperature Annealing on Microstructure Evolution of Ni-24Fe-14Cr-8Mo Superalloy

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.904.117 ◽

2021 ◽

Vol 904 ◽

pp. 117-123

Author(s):

Yi Cui ◽

Yun Fei Zhang ◽

Yan Guang Han ◽

Da Lv

Keyword(s):

High Temperature ◽

Microstructure Evolution ◽

Testing Machine ◽

Aging Treatment ◽

Growth Patterns ◽

High Temperature Annealing ◽

Rockwell Hardness ◽

Hardness Testing ◽

X Ray Diffraction ◽

X Ray

The effect of high temperature annealing on microstructure evolution of Ni-24Fe-14Cr-8Mo alloy was investigated through Optical Microscopy (OM), Scanning Electron Microscopy (SEM), X-Ray Diffraction (XRD) and Rockwell Hardness Testing Machine. Three kinds of grain growth patterns were found at different annealing temperatures due to carbides precipitation and dissolution. After a combination of high temperature annealing and aging treatment, the hardness versus time curves performed a parabolic pattern. The highest hardness was achieved under 1070°C/60 minutes treatment, and the desirable annealing time should be 60 minutes to 90 minutes.

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