Effects of Phosphorus on Microstructure and Mechanical Properties in NiCr Alloys

2018 ◽  
Vol 913 ◽  
pp. 141-149
Author(s):  
Xin Tong Lian ◽  
Wen Ru Sun ◽  
Xin Xin ◽  
Dan Dan Zheng ◽  
Shou Ren Guo
Keyword(s):  
Mechanical Properties ◽  
Yield Strength ◽  
Hot Rolling ◽  
Driving Force ◽  
Rolling Process ◽  
Hot Rolling Process ◽  
Microstructure And Mechanical Properties ◽  
Cast Alloys ◽  
Impact Energies ◽  
Dendritic Structures

Microstructure and mechanical properties of Ni-Cr alloys with various contents of Phosphorus (P) have been investigated. It is found that the increase of phosphorus refined dendritic structures in as-cast alloys and decreased micro-segregation of Chromium (Cr) element. α-Cr which precipitated during hot-rolling process was obviously inhibited by phosphorus because of its prior occupancy on grain boundaries and decreasing precipitation driving force of α-Cr. Tensile and impact properties were examined on samples under different heat treatments. Though the yield strength of as-rolled alloys was increased by precipitation of α-Cr, the elongation and impact energies were reduced. It is worthy to note that impact energies of samples solutioned at 950°C increased with the increasing phosphorus. The results indicated that dislocations are markedly effected by phosphorus which is probably the reason for improving impact energies.

Microstructure and Mechanical Properties of Mg-Li Powder by Hot Rolling Process

2015 ◽  
Vol 25 (1) ◽  
pp. 32-36
Author(s):  
Jeong-Won Choi ◽  
Yong-Ho Kim ◽  
Jung-Han Kim ◽  
Hyo-Sang Yoo ◽  
Kee-Do Woo ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Hot Rolling ◽  
Rolling Process ◽  
Hot Rolling Process ◽  
Microstructure And Mechanical Properties

Study on the Asymmetric Hot Rolling of Aluminium Alloy Thick Plate

2014 ◽  
Vol 794-796 ◽  
pp. 1275-1280
Author(s):  
Yu Bo Zuo ◽  
Xing Fu ◽  
Jian Zhong Cui ◽  
Ping Wang ◽  
Lei Li ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Aluminium Alloy ◽  
Hot Rolling ◽  
Thick Plate ◽  
Rolling Process ◽  
Aviation Industry ◽  
Hot Rolling Process ◽  
Microstructure And Mechanical Properties ◽  
Hot Rolled ◽  
Asymmetric Hot Rolling

The development of aviation industry demands hot rolled aluminium alloy extra thick plates. However, it is quite difficult to obtain sufficient and uniform deformation of extra thick plate by conventional hot rolling process. The asymmetric hot rolling can generate an additional shear deformation and significantly improve the equivalent strain at the centre of the plate and consequently the uniformity of the microstructure, and mechanical properties. In the present work, the asymmetric rolling (ASR) was achieved by adjusting the diameters of the upper roll and the lower roll and was used to prepare hot rolled thick plate of an aluminium alloy. The effect of the asymmetric hot rolling process on the deformation, shape control, microstructure and mechanical properties was experimentally studied. The results showed that the ASR has a significant effect on metal deformation and can somehow refine microstructure and improve the uniformity of microstructure and properties although plate bending often happens during rolling process. This paper presents these results and gives corresponding discussions.

Effect of Hot-Rolling Parameters on Microstructure and Mechanical Properties of 72LXA Steel Wire Rod

2012 ◽  
Vol 581-582 ◽  
pp. 842-846
Author(s):  
Jian Hua Zeng ◽  
Yi Chang Li ◽  
Zheng Zhou ◽  
Jun Chen
Keyword(s):  
Mechanical Properties ◽  
Hot Rolling ◽  
Steel Wire ◽  
Rolling Process ◽  
Impact Factors ◽  
Cooling Process ◽  
Controlled Cooling ◽  
Wire Rod ◽  
Microstructure And Mechanical Properties ◽  
Proeutectoid Ferrite

Effect of the laying head temperature and controlled cooling process on microstructure and mechanical properties of 72LXA wire rod were investigated．The results show that under the same cooling process，with the raising laying temperature and increasing sorbitizing rate and decreasing proeutectoid ferrite，the steel rod strength is improving，proeutectoid ferrite and sorbitizing rate are the critical impact factors on steel rod properties；indentifying cooling after perlite forming can restrain the dissolve of lamellar cementite；the mechanical properties of whole rod coil are improved by the proper rolling rate and air cooling．The high strength of 1050 MPa of steel rod was obtained，that shows the defined hot rolling process can conform to the steel rod properties requirement．

Microstructures and Strength of Hot-Rolled Mg-Zn-Y Alloys

2011 ◽  
Vol 291-294 ◽  
pp. 137-140
Author(s):  
Yao Min Zhu ◽  
Qiu Ran Gao ◽  
Feng Zhang Ren ◽  
Shi Jie Fang
Keyword(s):  
Grain Size ◽  
Tensile Strength ◽  
Hot Rolling ◽  
Rolling Process ◽  
Recrystallization Process ◽  
Fine Grained ◽  
Hot Rolling Process ◽  
Fine Grained Structure ◽  
Cast Alloys ◽  
Hot Rolled

The effects of the hot-rolling process on microstructures and strength were investigated for two kinds of magnesium alloy Mg-Zn-Y and Mg-Zn-Y-Nd. In comparison with the as-cast alloys, the tensile strength of Mg-Zn-Y and Mg-Zn-Y-Nd both increases 45%, whereas their elongation decreases 73%, 60% via hot-rolling process, respectively. The results show that the dynamic recrystallization process and the pining effect of I-phase during hot rolling contribute to the fine-grained structure formation. The hot-rolling process has refined the grain size greatly.

Microstructure and Mechanical Properties Investigation of New Al10Cr12Mn28Fe(50-x)Ni(x) High Entropy Alloys

2020 ◽  
Vol 998 ◽  
pp. 9-14
Author(s):  
Ahmed W. Abdel-Ghany ◽  
Sally Elkatatny ◽  
Mohamed Abdel Hady Gepreel
Keyword(s):  
Mechanical Properties ◽  
Yield Strength ◽  
Compressive Yield Strength ◽  
High Entropy Alloys ◽  
High Ductility ◽  
Cast Material ◽  
High Entropy ◽  
Arc Melting ◽  
Microstructure And Mechanical Properties ◽  
Cast Alloys

In the present study, two newly developed non-equiatomic high entropy Al10Cr12Mn28Fe(50-x)Ni(x) alloys (x= 20 & 15 at%, namely: Ni20 & Ni15, respectively) are investigated. The studied HEAs were designed based on thermodynamic principles to maintain high ductility and improve strength. Ingots were prepared using arc-melting then microstructure examinations and mechanical properties for the as-cast alloys were done. The mechanical properties were enhanced for the as-cast material, compared with previously introduced HEAs of the same system, namely Al5Cr12Mn28Fe35Ni20, (Al5) and Al10Cr12Mn23Fe35Ni20, (Al10). Al10Cr12Mn28Fe30Ni20 (Ni20) HEA generally shows the highest compressive yield strength which was improved by ∼7% when compared with previously introduced Al10.

Interface Microstructure and Properties of 304 Austenite Stainless Steel/Low Carbon Steel Clad Plate by Casting and Hot Rolling Process

2014 ◽  
Vol 852 ◽  
pp. 178-182
Author(s):  
Shuo Li ◽  
Di Tang ◽  
Hui Bin Wu ◽  
Ji Guang Xiong
Keyword(s):  
Mechanical Properties ◽  
Stainless Steel ◽  
Carbon Steel ◽  
Hot Rolling ◽  
Low Carbon Steel ◽  
Rolling Process ◽  
Low Carbon ◽  
Interface Shear ◽  
Austenite Stainless Steel ◽  
Hot Rolling Process

The 304 austenite stainless steel and low carbon steel clad plate was fabricated by casting and hot rolling process. The mechanical properties and interface shear strength of clad plates with different thickness after rolling were investigated in detail. The microstructure characteristics of the clad interface were observed by SEM (Scanning Electron Microscope). The phases and chemical composition were analyzed by XRD (X-ray diffraction) and EDS (energy dispersive spectroscopy). Based on the results, the mechanical properties and interface shear strengths meet the requirements of national standards. No visible cracks were observed in the clad interface after bending test. Cr3C2precipitates, Fe3O4oxides and Fe-Cr intermetallic compound were distributed around the interface of clad plate after casting, but a good metallurgical bonding was achieved after hot-rolling.

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