Influence of Hot Isostatic Pressing Temperature on the Microstructure and Properties of AlSi7Cu2Mg Alloys

Lanfang Guan; Zhenhua Wei; Hongkui Mao; Ruibin Duan; Wenda Zhang; Jianbin Hou; Hongbin Liu; Hong Xu

doi:10.1007/s11595-020-2365-7

Journal of Wuhan University of Technology Materials Science Edition ›› 2021, Vol. 35 ›› Issue (6) : 1135 -1141. DOI: 10.1007/s11595-020-2365-7

Metallic Material

Influence of Hot Isostatic Pressing Temperature on the Microstructure and Properties of AlSi7Cu2Mg Alloys

Lanfang Guan ¹^,³
, Zhenhua Wei ¹^,³
, Hongkui Mao ¹^,³
, Ruibin Duan ¹^,³^,^{^d}
, Wenda Zhang ¹^,³^,^{^e}
, Jianbin Hou ²
, Hongbin Liu ²
, Hong Xu ¹^,³

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Abstract

The roles of hot isostatic pressing (HIP) temperatures (490 °C/100 MPa/2 h, 510 °C/100 MPa/2 h, 530 C/100 MPa/2 h) in the microstructure and properties of AlSi7Cu2Mg alloy step castings with three types wall thicknesses were studied. The experimental results show that HIP at 490 C could effectively eliminate the internal closed porosity of the castings with a wall thickness of ≼40 mm, but for heavy castings (70 mm), even HIP at 530 C, a few loose defects remained inside the castings. Two types of incipient eutectics containing Al5Mg8Si6Cu2 and Al2Cu were observed in the samples that HIP at 530 C, which was responsible for the decrease of the tensile strength of the castings within the medium wall thickness (40 mm) compared with that HIP at 490 C. HIP could greatly reduce the difference of the tensile strength values of castings with wall thicknesses 17 mm and 70 mm from 117.93 MPa (without HIP) to 25.7 MPa (with HIP at 530 C).

Keywords

AlSiCuMg alloys / hot isostatic pressing / porosity / incipient melting

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Lanfang Guan, Zhenhua Wei, Hongkui Mao, Ruibin Duan, Wenda Zhang, Jianbin Hou, Hongbin Liu, Hong Xu. Influence of Hot Isostatic Pressing Temperature on the Microstructure and Properties of AlSi7Cu2Mg Alloys. Journal of Wuhan University of Technology Materials Science Edition, 2021, 35(6): 1135-1141 DOI:10.1007/s11595-020-2365-7

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References

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[1]	Yilmaz N, Vigil FM, Vigil MS, et al. Effect of Grain Orientation on Aluminum Relocation at Incipient Melt Conditions[J]. Mechanics of Materials, 2015, 88: 44-49.

[2]	Wang GQ, Sun QZ, Feng LM, et al. Influence of Cu Content on Ageing Behavior of AlSiMgCu Cast Alloys[J]. Materials & Design, 2007, 28(3): 1 001-1 005.

[3]	Akopyan TK, Belov NA, Letyagin NV. Effect of Trace Addition of Sn on the Precipitation Hardening in Al-Si-Cu Eutectic Alloy[J]. JOM, 2019, 71: 1 768-1 775.

[4]	Lombardi A, Ravindran C, Mackay R. Optimization of the Solution Heat Treatment Process to Improve Mechanical Properties of 319 Al Alloy Engine Blocks using the Billet Casting Method[J]. Materials Science and Engineering: A, 2015, 633: 125-135.

[5]	Sun S, Yuan B, Liu M. Effects of Moulding Sands and Wall Thickness on Microstructure and Mechanical Properties of Sr-modified A356 Aluminum Casting Alloy[J]. Transactions of Nonferrous Metals Society of China, 2012, 22(8): 1 884-1 890.

[6]	Ceschini L, Morri A, Morri A. Estimation of Local Fatigue Behaviour in A356-T6 Gravity Die Cast Engine Head based on Solidification DeFects Content[J]. International Journal of Cast Metals Research, 2013, 27(1): 56-64.

[7]	Ceschini L, Morri A, Sambogna G. The Effect of Hot Isostatic Pressing on the Fatigue Behaviour of Sand-cast A356-T6 and A204-T6 Aluminum Alloys[J]. Journal of Materials Processing Technology, 2008, 204(1–3): 231-238.

[8]	Ran G, Zhou JE, Wang QG. Precipitates and Tensile Fracture Mechanism in a Sand Cast A356 Aluminum Alloy[J]. Journal of Materials Processing Technology, 2008, 207(1–3): 46-52.

[9]	Nayhumwa C, Green NR, Campbell J. Influence of Casting Technique and Hot Isostatic Pressing on the Fatigue of an Al-7Si-Mg Alloy[J]. Metallurgical and Materials Transactions A, 2001, 32(2): 349-358.

[10]	Plessis AD, Rossouw P. Investigation of Porosity Changes in Cast Ti6Al4V Rods After Hot Isostatic Pressing[J]. Journal of Materials Engineering and Performance, 2015, 24(8): 3 137-3 141.

[11]	Bor HY, Hsu C, Wei CN. Influence of Hot Isostatic Pressing on the Fracture Transitions in the Fine Grain MAR-M247 Superalloys[J]. Materials Chemistry and Physics, 2004, 84(2–3): 284-290.

[12]	Zhou B, Wu D, Chen RS, et al. Enhanced Tensile Properties in a Mg-6Gd-3Y-0.5Zr Alloy Due to Hot Isostatic Pressing (HIP)[J]. Journal of Materials Science & Technology, 2019, 35(9): 1 860-1 868.

[13]	Ran G, Zhou J, Wang QG. The Effect of Hot Isostatic Pressing on the Microstructure and Tensile Properties of an Unmodified A356-T6 Cast Aluminum Alloy[J]. Journal of Alloys and Compounds, 2006, 421(1–2): 80-86.

[14]	Lei CSC, Frazier WE, Lee EW. The Effect of Hot Isostatic Pressing on Cast Aluminum[J]. JOM, 1997, 49(11): 38-39.

[15]	Ivanova E, Tagirov D, Kaibyshev R. Effect of Liquid Hot Isostatic Pressing on Structure and Mechanical Properties of Aluminum Gravity Die Castings[J]. Materials Science Forum, 2012, 706–709: 408-413.

[16]	Xu Q, Zhou J, Nan H, et al. Effects of Hot Isostatic Pressing Temperature on Casting Shrinkage Densification and Microstructure of Ti6Al4V Alloy[J]. China Foundry, 2017, 14(5): 429-434.

[17]	Zulfia A, Atkinson HV, Jones H, King S. Effect of Hot Isostatic Pressing on Cast A357 Aluminium Alloy with and Without SiC Particle Reinforcement[J]. Journal of Materials Science, 1999, 34: 4 305-4 310.

[18]	Chama CC, Mater J. Elimination of Porosity from Aluminum-silicon Castings by Hot isostatic Pressing[J]. Journal of Materials Engineering and Performance, 1992, 1(6): 773-779.

[19]	Zeren M, Karakulak E, GÜMÜŞ S. Influence of Cu Addition on Microstructure and Hardness of Near-eutectic Al-Si-xCu-alloys[J]. Transactions of Nonferrous Metals Society of China, 2011, 21(8): 1 698-1 702.

[20]	Mohamed AMA, Samuel FH, Al Kahtani S. Influence of Mg and Solution Heat Treatment on the Occurrence of Incipient Melting in Al-Si-Cu-Mg Cast Alloys[J]. Materials Science and Engineering: A, 2012, 543: 22-34.

[21]	Han YM, Samuel AM, Samuel FH, et al. Dissolution of Al2Cu Phase in Non-modified and Sr Modified 319 Type Alloys[J]. International Journal of Cast Metals Research, 2013, 21(5): 387-393.

[22]	Atkinson HV, Davies S. Fundamental Aspects of Hot Isostatic Pressing: An Overview[J]. Metallurgical and Materials Transactions A, 2000, 31(12): 2 981-3 000.

[23]	Zhang WD, Ma SX, Wei ZH, et al. The Relationship between Residual Amount of Sr and Morphology of Eutectic Si Phase in A356 Alloy[J]. Materials, 2019, 12(19): 3 222

[24]	Lombardi A, Ravindran C, MacKay R. Application of the Billet Casting Method to Determine the Onset of Incipient Melting of 319 Al Alloy Engine Blocks[J]. Journal of Materials Engineering and Performance, 2015, 24(6): 2 179-2 184.

[25]	Mondolfo LF. Aluminum Alloys: Structure and Properties[M]. Beijing: The Press of Metallurgical Industry, 1988: 723

[26]	Andilab B, Ravindran C, Dogan N, et al. In-situ Analysis of Incipient Melting of Al2Cu in a Novel High Strength Al-Cu Casting Alloy using Laser Scanning Confocal Microscopy[J]. Materials Characterization, 2020, 159: 110064.