An analysis of microstructure and impression creep response of squeeze-cast AZ91-xBi-ySr alloys

被引：2
|
作者：
Majhi, Jichil [1 ]
Das, Tanmoy [1 ]
Basu, A. [1 ]
Mondal, A. K. [2 ]
机构：
[1] Natl Inst Technol Rourkela, Dept Met & Mat Engn, Rourkela, India
[2] Indian Inst Technol BHU Varanasi, Dept Met Engn, Varanasi 221005, Uttar Pradesh, India
来源：
MATERIALS SCIENCE AND TECHNOLOGY | 2020年 / 36卷 / 06期
关键词：
AZ91 magnesium alloy; squeeze-casting; microstructure; intermetallic phase; impression creep; dislocation creep; dislocation pile-up; diffusion coefficient; MECHANICAL-PROPERTIES; MAGNESIUM ALLOY; BEHAVIOR; AZ91; ADDITIONS; AZ31;
D O I：
10.1080/02670836.2020.1736763
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The present investigation deals with the microstructural modification following the Bi + Sr additions to the squeeze-cast AZ91 alloy and its effect on impression creep response. The Bi + Sr additions form the Al4Sr and Sr2Bi phases besides the alpha-Mg and beta-Mg17Al12 phases, and improves creep resistance of the AZ91 alloy. The AZ91 + 1.0Bi + 0.5Sr alloy reveals the best creep resistance among the alloys. The stress exponent and the activation energy values of all the alloys are in the range of 4-7 and 100.2-112.7 kJ mol(-1), respectively, depicting the pipe diffusion-controlled dislocation creep is the governing creep mechanism. The post-creep microstructural study confirms several dislocations pile-ups around the Al4Sr and Sr2Bi phases resulting in improved creep resistance of the modified AZ91 alloys.
引用
收藏
页码：731 / 742
页数：12
相关论文
共 50 条
  • [1] Microstructure and impression creep characteristics of squeeze-cast AZ91 magnesium alloy containing Ca and/or Bi
    Majhi, Jichil
    Mondal, A. K.
    [J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2019, 744 : 691 - 703
  • [2] Impression creep behaviour of squeeze-cast Ca and Sb added AZ91 magnesium alloy
    Bankoti, A. K. S.
    Mondal, A. K.
    Dieringa, Hajo
    Ray, B. C.
    Kumar, S.
    [J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2016, 673 : 332 - 345
  • [3] Influence of ultrasonic shot peening on the microstructure and impression creep performance of squeeze-cast AZ91 alloy reinforced with graphene nanoplatelets
    Ganguly, Sourav
    Chaubey, A. K.
    Sahoo, Rajakishore
    Kushwaha, Adarsh
    Basu, Anindya
    Majhi, Jichil
    Gupta, Manoj
    [J]. JOURNAL OF ALLOYS AND COMPOUNDS, 2023, 938
  • [4] Correlation of Microstructure and Electrochemical Corrosion Behavior of Squeeze-Cast Ca and Sb Added AZ91 Mg Alloys
    Bankoti, A. K. S.
    Mondal, A. K.
    Perugu, Chandra S.
    Ray, B. C.
    Kumar, S.
    [J]. METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 2017, 48A (10): : 5106 - 5121
  • [5] Correlation of Microstructure and Electrochemical Corrosion Behavior of Squeeze-Cast Ca and Sb Added AZ91 Mg Alloys
    A. K. S. Bankoti
    A. K. Mondal
    Chandra S. Perugu
    B. C. Ray
    S. Kumar
    [J]. Metallurgical and Materials Transactions A, 2017, 48 : 5106 - 5121
  • [6] Influence of additions of Sb and/or Sr on microstructure and tensile creep behaviour of squeeze-cast AZ91D Mg alloy
    Kumar, Punit
    Mondal, A. K.
    Chowdhury, S. G.
    Krishna, G.
    Ray, Ashok Kumar
    [J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2017, 683 : 37 - 45
  • [7] Influence of SiC nanoparticleS addition on microstructure and creep behavior of squeeze-cast AZ91-Ca-Sb magnesium alloy
    Ganguly, Sourav
    Mondal, A. K.
    [J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2018, 718 : 377 - 389
  • [8] Effect of Y, Sr, and Nd additions on the microstructure and microfracture mechanism of squeeze-cast AZ91-X magnesium alloys
    Sunghak Lee
    Seung Hyuk Lee
    Do Hyang Kim
    [J]. Metallurgical and Materials Transactions A, 1998, 29 : 1221 - 1235
  • [9] Effect of Y, Sr, and Nd additions on the microstructure and microfracture mechanism of squeeze-cast AZ91-X magnesium alloys
    Lee, S
    Lee, SH
    Kim, DH
    [J]. METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1998, 29 (04): : 1221 - 1235
  • [10] Microstructure characteristics and effect of aging process on the mechanical properties of squeeze-cast AZ91 alloy
    Han, G. M.
    Han, Z. Q.
    Luo, A. A.
    Liu, B. C.
    [J]. JOURNAL OF ALLOYS AND COMPOUNDS, 2015, 641 : 56 - 63
12345