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作者:

Ma, Shiyu (Ma, Shiyu.) | Lv, Xianzi (Lv, Xianzi.) | Zhang, Jianxin (Zhang, Jianxin.) | Zhang, Youjian (Zhang, Youjian.) | Li, Pan (Li, Pan.) | Jin, Huixin (Jin, Huixin.) | Zhang, Wenyang (Zhang, Wenyang.) | Li, Xueqiao (Li, Xueqiao.) | Mao, Shengcheng (Mao, Shengcheng.) (学者:毛圣成)

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EI Scopus SCIE

摘要:

Misfit dislocation structures are investigated in a nickel-based single crystal superalloy subjected to 38.8 h creep at 1100 degrees C and 130 MPa using conventional and high resolution transmission electron microscopy (HRTEM). The misfit dislocation was identified as an uncommon one with Burgers vector b = a/2[(2) over bar 11], which can be described as inserting (or extracting) one (1 (1) over bar1) half plane and one (11 (1) over bar) half plane. This dislocation was decomposed into two partial dislocations b(1) and b(2), with b(1) = a/2[(1) over bar 01] and b(2) = a/2[(2) over bar 11]. Partial dislocations b(1) and b(2) were arranged in a "V" shape, connected by the antiphase boundary (APB), which could hinder the dislocation motion to achieve the effect of dislocation enhancement. (c) 2018 Elsevier B.V. All rights reserved.

关键词:

Stress distribution Core structure High-temperature and low-stress creep Strengthening mechanism Nickel based superalloys Misfit dislocation

作者机构:

  • [ 1 ] [Ma, Shiyu]Shandong Univ, Key Lab Liquid Solid Struct Evolut & Proc Mat, Minist Educ, Jinan 250061, Shandong, Peoples R China
  • [ 2 ] [Lv, Xianzi]Shandong Univ, Key Lab Liquid Solid Struct Evolut & Proc Mat, Minist Educ, Jinan 250061, Shandong, Peoples R China
  • [ 3 ] [Zhang, Jianxin]Shandong Univ, Key Lab Liquid Solid Struct Evolut & Proc Mat, Minist Educ, Jinan 250061, Shandong, Peoples R China
  • [ 4 ] [Zhang, Youjian]Shandong Univ, Key Lab Liquid Solid Struct Evolut & Proc Mat, Minist Educ, Jinan 250061, Shandong, Peoples R China
  • [ 5 ] [Li, Pan]Shandong Univ, Key Lab Liquid Solid Struct Evolut & Proc Mat, Minist Educ, Jinan 250061, Shandong, Peoples R China
  • [ 6 ] [Jin, Huixin]Shandong Univ, Key Lab Liquid Solid Struct Evolut & Proc Mat, Minist Educ, Jinan 250061, Shandong, Peoples R China
  • [ 7 ] [Zhang, Wenyang]Shandong Univ, Key Lab Liquid Solid Struct Evolut & Proc Mat, Minist Educ, Jinan 250061, Shandong, Peoples R China
  • [ 8 ] [Li, Xueqiao]Beijing Univ Technol, Beijing Key Lab Microstruct & Property Adv Mat, Beijing 100024, Peoples R China
  • [ 9 ] [Mao, Shengcheng]Beijing Univ Technol, Beijing Key Lab Microstruct & Property Adv Mat, Beijing 100024, Peoples R China

通讯作者信息:

  • [Zhang, Jianxin]Shandong Univ, Sch Mat Sci & Engn, 17923 Jingshi Rd, Jinan 250061, Shandong, Peoples R China

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来源 :

JOURNAL OF ALLOYS AND COMPOUNDS

ISSN: 0925-8388

年份: 2018

卷: 743

页码: 372-376

6 . 2 0 0

JCR@2022

ESI学科: MATERIALS SCIENCE;

ESI高被引阀值:260

JCR分区:1

被引次数:

WoS核心集被引频次: 9

SCOPUS被引频次: 11

ESI高被引论文在榜: 0 展开所有

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