scholarly journals Effects of Temperature and Pressure of Hot Isostatic Pressing on the Grain Structure of Powder Metallurgy Superalloy

Materials ◽  
2018 ◽  
Vol 11 (2) ◽  
pp. 328 ◽  
Author(s):  
Liming Tan ◽  
Guoai He ◽  
Feng Liu ◽  
Yunping Li ◽  
Liang Jiang
Keyword(s):  
Powder Metallurgy ◽  
Hot Isostatic Pressing ◽  
Grain Structure ◽  
Isostatic Pressing ◽  
Effects Of Temperature ◽  
Temperature And Pressure

scholarly journals Evolution of the Microstructure and Mechanical Properties of a Ti35Nb2Sn Alloy Post-Processed by Hot Isostatic Pressing for Biomedical Applications

Metals ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 1027
Author(s):  
Joan Lario ◽  
Ángel Vicente ◽  
Vicente Amigó
Keyword(s):  
Powder Metallurgy ◽  
Mechanical Strength ◽  
Room Temperature ◽  
Hot Isostatic Pressing ◽  
Phase Changes ◽  
Post Processing ◽  
Isostatic Pressing ◽  
Porosity Reduction ◽  
Processing Step ◽  
Hip Process

The HIP post-processing step is required for developing next generation of advanced powder metallurgy titanium alloys for orthopedic and dental applications. The influence of the hot isostatic pressing (HIP) post-processing step on structural and phase changes, porosity healing, and mechanical strength in a powder metallurgy Ti35Nb2Sn alloy was studied. Powders were pressed at room temperature at 750 MPa, and then sintered at 1350 °C in a vacuum for 3 h. The standard HIP process at 1200 °C and 150 MPa for 3 h was performed to study its effect on a Ti35Nb2Sn powder metallurgy alloy. The influence of the HIP process and cold rate on the density, microstructure, quantity of interstitial elements, mechanical strength, and Young’s modulus was investigated. HIP post-processing for 2 h at 1200 °C and 150 MPa led to greater porosity reduction and a marked retention of the β phase at room temperature. The slow cooling rate during the HIP process affected phase stability, with a large amount of α”-phase precipitate, which decreased the titanium alloy’s yield strength.

Development of Ni-base metal matrix composites by powder metallurgy hot isostatic pressing for space applications

2022 ◽  
pp. 103411
Author(s):  
Alessandro Sergi ◽  
Raja H.U. Khan ◽  
Sandeep Irukuvarghula ◽  
Martina Meisnar ◽  
Advenit Makaya ◽  
...  
Keyword(s):  
Powder Metallurgy ◽  
Metal Matrix Composites ◽  
Base Metal ◽  
Metal Matrix ◽  
Hot Isostatic Pressing ◽  
Matrix Composites ◽  
Space Applications ◽  
Isostatic Pressing

Fabrication and mechanical properties of powder metallurgy tantalum prepared by hot isostatic pressing

2015 ◽  
Vol 48 ◽  
pp. 211-216 ◽  
Author(s):  
Youngmoo Kim ◽  
Eun-Pyo Kim ◽  
Joon-Woong Noh ◽  
Sung Ho Lee ◽  
Young-Sam Kwon ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Powder Metallurgy ◽  
Hot Isostatic Pressing ◽  
Isostatic Pressing

A Novel Forming Process for Powder Metallurgy of Superalloys

2014 ◽  
Vol 622-623 ◽  
pp. 833-839 ◽  
Author(s):  
Qian Bai ◽  
Jian Guo Lin ◽  
Gao Feng Tian ◽  
Daniel S. Balint ◽  
Jin Wen Zou
Keyword(s):  
Powder Metallurgy ◽  
Relative Density ◽  
High Performance ◽  
Low Cost ◽  
Hot Isostatic Pressing ◽  
Hot Extrusion ◽  
Forming Process ◽  
Isostatic Pressing ◽  
Wide Range ◽  
Forming Temperature

Powder metallurgy (PM) of nickel-based superalloys has been used for a wide range of products owing to their excellent special properties in processing and applications. Typical processes for high performance PM superalloys include hot isostatic pressing, hot extrusion and hot isothermal forging. Hot isostatic pressing is normally conducted at a high temperature, by using a low pressure for a long time in a closed vessel, resulting in high cost and low product efficiency. In this paper a novel forming process, i.e. direct powder forging for powder metallurgy of superalloys has been proposed. In this process, the encapsulated and vacuumed powder is heated up to the forming temperature and forged directly to the final shape, by using a high forming load for a very short time. Direct powder forging is a low-cost and energy-saving process compared to conventional PM processes, and in addition, press machines of conventional forging can be used for direct powder forming process. In direct powder forging it is important to control the relative density of the deformed part since the existence of voids could reduce the mechanical strength and fatigue life. In this paper, feasibility tests of direct powder forging are presented. Microstructure, relative density and hardness of the formed specimen were studied.

scholarly journals Thermal stability of the grain structure in the W-2V and W-2V-0.5Y2O3 alloys produced by hot isostatic pressing

2013 ◽  
Vol 88 (9-10) ◽  
pp. 2636-2640 ◽  
Author(s):  
J. Martínez ◽  
B. Savoini ◽  
M.A. Monge ◽  
A. Muñoz ◽  
D.E.J. Armstrong ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Hot Isostatic Pressing ◽  
Grain Structure ◽  
Isostatic Pressing ◽  
Thermal Stability Of
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