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Influence of Processing Conditions on Microstructure and Mechanical Properties of Large Thin-Wall Centrifugal Ti-6Al-4V Casting
Feng, Xin; Qiu, Jianke; Ma, Yingjie; Lei, Jiafeng; Cui, Yuyou; Wu, Xinhua; Yang, Rui; Lei, JF (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China.
2016-04-01
Source PublicationJOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
ISSN1005-0302
Volume32Issue:4Pages:362-371
AbstractIn this work, the effects of mould pre-heating temperatures and hot isostatic pressing (HIPping) process on the microstructural characteristics and mechanical properties, including static tensile and damage-tolerance properties of large thin-wall cylindrical Ti-6Al-4V casting, have been studied. The experimental results show that with the increasing mould pre-heating temperature from 673 to 873 K, the casting microstructures change from a mixture of Widmanstatten and colony microstructure to a primary colony. The centre of the thick wall section has relatively coarse microstructure than the edge and thin section. Lower mould pre-heating temperature brings about more porosities. HIPping process, which not only reduces the casting pores effectively but also increases the prior beta grain boundary cohesion and coarsens the microstructure, is essential to improving the ductility of the casting. Due to the oxygen contamination and finer microstructure on the surface, micro-hardness profiles on the cross section present a decreasing tendency from the surface to inner. The thickness of the reaction layers for the different mould pre-heating temperatures is nearly the same (similar to 450 mu m). On the whole, the tensile strength and microhardness decrease with increasing mould pre-heating temperature from 673 to 873 K. However, the fracture toughness and fatigue crack growth resistance of the castings increase with increasing mould preheating temperature. Copyright (C) 2016, The editorial office of Journal of Materials Science & Technology. Published by Elsevier Limited. All rights reserved.
description.department[feng, xin ; qiu, jianke ; ma, yingjie ; lei, jiafeng ; cui, yuyou ; yang, rui] chinese acad sci, inst met res, shenyang 110016, peoples r china ; [wu, xinhua] monash univ, dept mat engn, melbourne, vic 3800, australia
KeywordTi-6al-4v Alloy Centrifugal Investment Casting Hot Isostatic Pressing Casting Microstructure Tensile Properties Damage-tolerance Properties
Subject AreaMaterials Science ; Metallurgy & Metallurgical Engineering
Funding OrganizationCOLTS programme [FP7-AAT-2010-RTD-CHINA]
Indexed Bysci
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/75924
Collection中国科学院金属研究所
Corresponding AuthorLei, JF (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China.
Recommended Citation
GB/T 7714
Feng, Xin,Qiu, Jianke,Ma, Yingjie,et al. Influence of Processing Conditions on Microstructure and Mechanical Properties of Large Thin-Wall Centrifugal Ti-6Al-4V Casting[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2016,32(4):362-371.
APA Feng, Xin.,Qiu, Jianke.,Ma, Yingjie.,Lei, Jiafeng.,Cui, Yuyou.,...&Lei, JF .(2016).Influence of Processing Conditions on Microstructure and Mechanical Properties of Large Thin-Wall Centrifugal Ti-6Al-4V Casting.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,32(4),362-371.
MLA Feng, Xin,et al."Influence of Processing Conditions on Microstructure and Mechanical Properties of Large Thin-Wall Centrifugal Ti-6Al-4V Casting".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 32.4(2016):362-371.
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