Effect of Cold Rolling and Heat Treatment on the Mechanical Properties of GH4169 Alloy Sheet at Room Temperature

Zhang, Shihong; Ye, Neng-yong; Cheng, Ming; Song, Hong-Wu; Zhou, Hongwei; Wang, Pingbo

doi:10.3390/met6010001

Cited by 19 publications

(2 citation statements)

References 23 publications

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“…The GH4169 superalloy has been widely used in aerospace, aviation, and other industries due to its excellent properties [1][2][3][4][5]. However, its properties are difficult to fully utilize in machining.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Milling Cooling Conditions on the Surface Integrity and Fatigue Behavior of the GH4169 Superalloy

Zhou

et al. 2019

Metals

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The GH4169 superalloy has high strength at high temperatures. Cooling conditions have a major impact on the machined surface integrity, which further affects the fatigue properties of specimens of the GH4169 superalloy. The influence of cooling conditions on the surface integrity of the GH4169 superalloy is first studied during the side milling. Then, the effect of surface integrity under different cooling conditions on the fatigue behavior of specimens of the GH4169 superalloy is investigated by a standard tensile and tensile–mode fatigue testing. The results obtained show that surface roughness and the depth of the plastic deformation layer in wet milling and dry milling makes little difference, the surface microhardness rate in dry milling is slightly lower than that in wet milling, the surface tensile residual stress in dry milling is significantly higher than that in wet milling, and the fatigue behavior in dry milling is only about 50% of that in wet milling. In addition, the crack initiation of specimens of the GH4169 superalloy utilizing wet milling is on the subsurface, while that from dry milling is on the surface. Thus, cooling conditions have an important impact on the fatigue behavior of specimens of the GH4169 superalloy, and micro defects in dry milling are the main factors of decreasing of fatigue behavior of specimens of the GH4169 superalloy.

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Section: Introductionmentioning

confidence: 99%

The Effect of Milling Cooling Conditions on the Surface Integrity and Fatigue Behavior of the GH4169 Superalloy

Zhou

et al. 2019

Metals

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“…2 Pramuko Ilmu Purboputro, Fransianto Setyo Aji Studi Age Hardening pada Struktur Mikro, Kekerasan dan Harga Impak Aluminium-Zink (Al-Zn) Hasil Cold Rolling dengan Reduksi 20% Dalam penelitian ini dilakukan analisa tentang perubahan sifat mekanis hasil proses pengerolan pada material aluminium paduan dan pengaruh age hardening setelah proses cold rolling [5]. Hasil yang diharapkan untuk mengetahui perubahan struktur mikro (ASTM E3) pada material akibat proses cold rolling dan age hardening, mengetahui perubahan nilai kekerasan (ASTM E384) dan harga impak Charpy (ASTM E23) pada material hasil Cold rolling [6] [7] [8], dan mengetahui perubahan nilai kekerasan (ASTM E384) dan harga impak charpy (ASTM E23) pada material hasil cold rolling setelah melewati proses age hardening [6] [7] [8] [9].…”

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Studi Age Hardening pada Struktur Mikro, Kekerasan dan Harga Impak Aluminium-Zink (Al-Zn) Hasil Cold Rolling dengan Reduksi 20%

Purboputro

Aji

2022

jttm

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Penelitian ini bertujuan untuk mengetahui perubahan sifat fisis dan mekanis pada aluminium Al-Zn setelah di lakukan proses cold rolling reduksi 20% dan age hardening dengan cara melakukan foto mikro, pengujian kekerasan dan pengujian impak. Metoda yang dilakukan adalah mengawali dengan proses pengerolan dengan reduksi 20%, kemudian diikuti dengan proses age hardening. Pengujian kekerasan diakukan pada alat uji kekerasan Vickers, dan pengujian impak pada mesin uji Charpy. Struktur mikro dilakukan dengan alat mikroskop untuk memeriksa struktur mkro. Hasil kekerasan, kekuatan impak dan struktur mikro dibandingkan dengan spesimen sebelum perlakuan thermo-mekanisnya. Hasil pengujian kekerasan dan impak menunjukkan aluminium Al-Zn mengalami peningkatan nilai kekerasan sebesar 9,9% setelah proses cold rolling yaitu 165,5 HV, dan meningkat 27,1% dengan proses cold rolling dan age hardening yaitu 191,4 HV. Namun mengalami penurunan nilai ketangguhan sebesar 19,4% yaitu dengan harga impak sebesar 0,191 J/mm² setelah di proses cold rolling reduksi 20% dan menurun sebesar 38,8% dengan harga impak sebesar 0,145 J/mm setelah proses cold rolling reduksi 20% dan proses age hardening

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Influence of Process Parameters on Microstructure Evolution During Hot Deformation of a Eutectic High-Entropy Alloy (EHEA)

Ahmed

Chadha

Reddy

et al. 2020

Metall Mater Trans A

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High-entropy alloys (HEAs) have shown unique combinations of strength and ductility along with other properties after optimized thermomechanical processing (TMP). In this study, the hot deformation of an AlCoCrFeNi 2.1 eutectic high-entropy alloy (EHEA) was studied by using a Gleeble 3800 Ò thermomechanical simulator at 800°C, 1000°C and 1200°C deformation temperature under different strain rates of 10 À4 , 10 À2 , and 1 s À1. The influence of strain rate and temperature on the evolution of the microstructure was discussed. The apparent activation energy (Q), stress exponent (n) and Zener-Holloman parameter (Z) were determined from the true stress-strain curves to develop the constitutive equation. The activation energy was determined to be 336 kJ/mol, and the stress exponent (n) was 2.5. Microstructures, characterized using electron-backscattered diffraction (EBSD), were analyzed as a function of (Z) values and interpreted in terms of solute diffusion and the interactions between dynamic softening (dynamic recovery and dynamic recrystallization) and hardening (dynamic precipitation) phenomena. It was found that the hot deformation behavior of EHEAs was controlled by pipe diffusion for the selected process parameters. The pipe diffusion coefficient of Ni increased with increasing strain rate at constant deformation temperature, whereas the lattice diffusion coefficient remained constant for all the examined strain rates. Dynamic recovery (DRV) was the dominant softening mechanism at lower temperatures irrespective of strain rates, while dynamic precipitation played a critical role in the inhibition of dynamic recrystallization (DRX) under these conditions. At higher temperatures and for all the strain rates, microstructure evolution was controlled by the DRX mechanism.

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Effect of Cold Rolling and Heat Treatment on the Mechanical Properties of GH4169 Alloy Sheet at Room Temperature

Cited by 19 publications

References 23 publications

The Effect of Milling Cooling Conditions on the Surface Integrity and Fatigue Behavior of the GH4169 Superalloy

The Effect of Milling Cooling Conditions on the Surface Integrity and Fatigue Behavior of the GH4169 Superalloy

Studi Age Hardening pada Struktur Mikro, Kekerasan dan Harga Impak Aluminium-Zink (Al-Zn) Hasil Cold Rolling dengan Reduksi 20%

Influence of Process Parameters on Microstructure Evolution During Hot Deformation of a Eutectic High-Entropy Alloy (EHEA)

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