Article
Nanoscience & Nanotechnology
Yaoxin Huo, Zhengguan Lu, Min Cheng, Jinping Fan, Junwei Qiao, Lei Xu, Ruipeng Guo, Rui Yang, P. K. Liaw
Summary: This study presents the first investigation on the dwell-fatigue behavior and damage mechanism of as-HIPed Ti-6Al-4V powder compact. The results show that the peak stress and stress ratio have significant effects on dwell fatigue behavior. A crack-initiation and propagation model based on soft-hard grain pairs has been proposed to explain the dwell-fatigue mechanism.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Engineering, Mechanical
Michael Andrew Hills, Jarryd Scott Malcolm, Nur Mohamed Dhansay, Thorsten Hermann Becker
Summary: Metal additive manufacturing parts are prone to fatigue failure due to manufacturing defects such as rough surface finish, internal pores, high residual stress, and martensitic microstructure. Rough surface finish is the most significant factor limiting fatigue strength as it causes stress concentration. Chemical etching techniques can effectively reduce surface roughness and increase fatigue strength.
INTERNATIONAL JOURNAL OF FATIGUE
(2023)
Article
Materials Science, Multidisciplinary
Haijun Liu, Zhimin Zhang, Kaihua Xu, Jishi Zhang, Yong Xue, Qiang Wang
Summary: The study on a hot isostatic pressed Ti-6Al-4V alloy during multi-pass deformation at variable temperature parameters revealed the microstructural and microhardness evolution, showing significant changes in the deformation mechanisms and phase transformations of the alloy. The results also demonstrated the variations in lamellar alpha phase characteristics, such as rotation, length, thickness, and spheroidization, with an increase in strain rates. Additionally, the contribution of calphal in the integrated hardness during multi-pass deformation was found to be greater at higher deformation temperatures.
MATERIALS CHARACTERIZATION
(2021)
Article
Materials Science, Multidisciplinary
Zonghong Qu, Pingxiang Zhang, Yunjin Lai, Qingxiang Wang, Jiaming Song, Shujin Liang
Summary: The influence of powder particle size on the microstructure of the powder metallurgy superalloy FGH97 was investigated. The results showed that fine powder led to limited plastic deformation, resulting in fewer boundaries and modest particle boundary decoration. On the other hand, medium-sized and coarse powder did not exhibit particle boundary. Therefore, medium-sized powder is the optimal choice.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Chemistry, Physical
Terrence P. Moran, Patricio E. Carrion, Seungjong Lee, Nima Shamsaei, Nam Phan, Derek H. Warner
Summary: This study investigates the efficacy of hot isostatic pressing (HIP) in enhancing the fatigue performance of additively manufactured (AM) Ti-6Al-4V. The limitations of HIP are explored by varying the initial material state through the selection of AM system, powder chemical composition, and process parameters. It is found that the fatigue performance of HIP'd AM Ti-6Al-4V depends on the as-built quality, and differences in common material attributes cannot fully explain the observed discrepancies in performance. Furthermore, exploring HIP parameters outside of ASTM recommendations shows that a reduced temperature and high-pressure treatment significantly improve fatigue performance.
Article
Metallurgy & Metallurgical Engineering
Yi Xiao, Li-hui Lang, Wen-cai Xu, De-xin Zhang
Summary: High-quality Ti-6Al-4V powder-solid parts were successfully fabricated using the hot isostatic pressing (HIP) process, which possessed good interfacial strength and mechanical properties.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2022)
Article
Materials Science, Multidisciplinary
Min Cheng, Zhengguan Lu, Jie Wu, Ruipeng Guo, Junwei Qiao, Lei Xu, Rui Yang
Summary: The study found that residual pores have little effect on the high-cycle fatigue life of hot-isostatic-pressed alloys, but regrowth of residual pores can be observed after solution heat treatment. The location of pores has the most significant impact on fatigue life compared to other defects.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Nanoscience & Nanotechnology
Meili Zhang, Chi-Ho Ng, Ali Dehghan-Manshadi, Chris Hall, Michael J. Bermingham, Matthew S. Dargusch
Summary: Super beta-transus hot isostatic pressing (HIPing) can transform columnar grains to equiaxed grains in additively manufactured Ti-6Al-4V. It is unclear whether super beta-transus HIPing can also generate isotropic microstructure and mechanical properties in high-density additively manufactured Ti-6Al-4V.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Ceramics
Pranesh Dayal, Rifat Farzana, Yingjie Zhang, Gregory R. Lumpkin, Rohan Holmes, Gerry Triani, Daniel J. Gregg
Summary: Zirconolite-rich full ceramic wasteforms designed to immobilize Pu-bearing wastes were produced using stainless steel and nickel hot isostatic pressing (HIP) canisters. The interactions between the canisters and wasteforms were studied, showing that the stainless steel canisters had a larger interaction zone compared to the nickel canisters. Additionally, the HIP process did not have any detrimental effects on the canister wall thickness.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Chemistry, Physical
Abbas Ahmadi Siahboumi, Ahmad Kermanpur, Fazlollah Sadeghi, Hamid Reza Ghorbani
Summary: This study investigated the microstructural evolutions during solidification and hot isostatic pressing (HIP) of Ti-48Al-2Cr-2Nb-xHf (4822-xHf, x = 0, 2, 4, 6 at%) intermetallic alloys, revealing finer dendritic microstructure in high-Hf alloys and discussing the precipitation mechanism of Al3Hf2 particles.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Nicholas Derimow, Jake T. Benzing, Keenan Hanson, Nikolas Hrabe
Summary: A globular alpha recrystallization has been found on the surface of net shape electron beam powder-bed fusion (PBF-EB) Ti-6Al-4V alloy parts. This recrystallization is a result of powder recovery blasting and hot isostatic pressing treatment (HIP), simulating the thermomechanical treatment required for globularization in wrought Ti-6Al-4V. The thickness of the globular surface alpha layer varies depending on the blasting intensity and the presence of surface protrusions. Controlled blasting parameters and globular surface layer thickness could potentially create tunable fatigue and wear performance.
Article
Nanoscience & Nanotechnology
Alessandro Sergi, Raja H. U. Khan, Moataz M. Attallah
Summary: The characteristics and purity of powders significantly influence the properties of Ni-base superalloy parts produced through NNS PM HIP process. IN625 powders produced by different atomisation routes showed differences in microstructure and precipitates after HIPping. Among the four powders, PA HIPped IN625 exhibited the best balance of properties and matched that of wrought IN625 material.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Ceramics
Rifat Farzana, Pranesh Dayal, Anton Peristyy, Phillip Sutton, Zaynab Aly, Robert D. Aughterson, Thanh Ha Nguyen, Michelle Yeoh, Pramod Koshy, Daniel J. Gregg
Summary: Synroc technology, utilizing hot-isostatic pressing (HIPing), has potential for the immobilisation of challenging nuclear wastes. This study investigates the effect of titanium metal addition on phase formation and wasteform performance. Samples with 2% and 4% titanium additions showed desired phase formation and compatible durability results.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Engineering, Manufacturing
Lingxiao Zeng, Wen Hao Kan, Kun Zhang, Chao Voon Samuel Lim, Louis Ngai Sum Chiu, Shaun David Gregory, Aijun Huang
Summary: Despite the slow production speed of LPBF, a hybrid approach combining LPBF and HIP can be used to accelerate the process. This study investigates the viability of using HIP to consolidate non-accessible powder-filled cavities in an LPBF Ti-6Al-4V part. Results show that HIP can achieve excellent bonding across the shell/cavity interface, although the elongation of the cavity region is poorer.
JOURNAL OF MANUFACTURING PROCESSES
(2023)
Article
Engineering, Manufacturing
Riccardo Tosi, Chu Lun Alex Leung, Xipeng Tan, Emmanuel Muzangaza, Moataz M. Attallah
Summary: This study systematically investigates the microstructural evolution of E-PBF/HIP Ti-6Al-4V parts and finds that the microstructure can be controlled by adjusting the porosity and pore morphology. The study also reveals that the grain morphology transitions during HIP are driven by the increase in pore volume and lack-of-fusion pores.
ADDITIVE MANUFACTURING
(2022)
Article
Chemistry, Physical
Chunlei Qiu, Xinhua Wu, Junfa Mei, Paul Andrews, Wayne Voice
JOURNAL OF ALLOYS AND COMPOUNDS
(2013)
Article
Engineering, Industrial
F. Wang, J. Mei, Xinhua Wu
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
(2008)
Article
Nanoscience & Nanotechnology
Z. Wu, J. Mei, W. Voice, Steve Beech, X. Wu
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2011)
Article
Nanoscience & Nanotechnology
Lingfei Cao, Xiaodong Wu, Suming Zhu, Junfa Mei, Xinhua Wu, Colleen Bettles
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2014)
Proceedings Paper
Engineering, Manufacturing
D. Tomus, T. Jarvis, X. Wu, J. Mei, P. Rometsch, E. Herny, J. -F. Rideau, S. Vaillant
LASERS IN MANUFACTURING (LIM 2013)
(2013)
Proceedings Paper
Physics, Applied
A. Wang, J. Mei, Y. Y. Tse, I. P. Jones, R. L. Sammons
17TH INTERNATIONAL SCHOOL ON CONDENSED MATTER PHYSICS (ISCMP): OPEN PROBLEMS IN CONDENSED MATTER PHYSICS, BIOMEDICAL PHYSICS AND THEIR APPLICATIONS
(2012)
Article
Nanoscience & Nanotechnology
F. Wang, J. Mei, H. Jiang, X. Wu
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2007)
Article
Engineering, Industrial
W. X. Yuan, J. Mei, V. Samarov, D. Seliverstov, X. Wu
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
(2007)
Article
Nanoscience & Nanotechnology
Aijun Huang, D. Hu, M. H. Loretto, J. Mei, Xinhua Wu
SCRIPTA MATERIALIA
(2007)
Article
Chemistry, Physical
Fude Wang, J. Mei, Xinhua Wu
APPLIED SURFACE SCIENCE
(2006)
Article
Materials Science, Multidisciplinary
A Davidson, K Zhang, W Yuan, J Mei, P Hurley, MR Bache, MH Loretto, WE Voice, XH Wu
MATERIALS SCIENCE AND TECHNOLOGY
(2006)
Article
Materials Science, Multidisciplinary
L Qian, J Mei, J Liang, X Wu
MATERIALS SCIENCE AND TECHNOLOGY
(2005)
Article
Materials Science, Multidisciplinary
XH Wu, LA Jing, JF Mel, C Mitchell, PS Goodwin, W Voice
MATERIALS & DESIGN
(2004)
Article
Materials Science, Multidisciplinary
F. Wang, J. Mei, Xinhua Wu
MATERIALS & DESIGN
(2007)
