涂覆Ni-Cr-Al-Y涂层的镍基高温合金热机械疲劳
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Shenyang 110016
ZHU Shijie Department of Intelligent Mechanical Engineering,Fukuoka Institute of Technology,Fukuoka,Japan Correspondent:毗4ⅣG Zhongguang,professor,弛f?(02j)8397ssw,E-maih zhgwang@imr.ac.cn SuppoSed by Center for Interracial MaterialsI Shenyang National Laboratory for Materials Science.
第45卷
第7期
2009年7月第820—-825页
金属学故
ACTA METALLURGICA SINICA
Vbl.45 NO.7 Jul.2009 PP.820-825
涂覆Ni—cr-Al—Y涂层的镍基高温合金热机械疲劳行为
陈竹兵 黄志伟 王中光
(中国科学院金属研究所沈阳材料科学国家(联合)实验室,沈阳110016)
+沈阳界面材料研究中心海外学者计划项目资助CIM09SJZHU
收到初稿日期:200叫13—11,收到修改稿日期:2009—04—10
作者简介:陈竹兵,男,1983年生,博士生
万方数据
第7期
陈竹兵等:涂覆Ni—C卜Al-Y涂层的镍基高温合金热机械疲劳行为821
In this paper,thermo-mechanical fatigue(TMF)behaviors of a Ni—based superalloy M963 coated with
朱世杰
(Department of Intelligent Mechanical Engineering,Fukuoka Institute of Technology,Fukuoka,Japan)
摘要 分别采取大气等离子(APS)和高速火焰(HVOF)工艺制备Ni--Cr—Al—_Y涂层.对涂覆Ni—C卜Al—Y涂层的高温 合金试样的热机械疲劳(TMF)行为进行了研究.结果表明:在相同应变幅下,2种涂层试样都是反相位热机械疲劳(OP TMF) 寿命比同相位热机械疲劳(IP TMF)寿命短;在不同应变幅下,试样的热机械疲劳寿命与涂层的喷涂工艺相关.通过断口和纵向剖
面图的观察分析表明,裂纹的萌生对试样的寿命有很大的影响.
关键词 镍基高温合金,Ni--Cr—A卜Y涂层,热机械疲劳,裂纹萌生与扩展 中图法分类号TGl46.15,V231.95 文献标识码A 文章编号0412-1961(2009)07—0820—06
THERMO—MECHANICAL FALTIGUE BEHAVIoR oF Ni—
1实ห้องสมุดไป่ตู้方法
M963合金的化学成分(质量分数,%)为:C 0.15, Cr 8.89,Al 6.00,Ti 2.55,Mo 1.64,W 10.1,Co 10.0, Nb 1.10,Zr 0.03,B 0.03,Ce 0.02,Y 0.01,Ni余量.实 验母合金采用真空感应炉重熔并浇铸成棒状试样,随后对 其进行1210"C/4 h+AC(空冷)的固溶处理.处理后的棒 材加工成标距直径为6 mm,标距长度为25 nlnl的试样, 并对试样进行机械抛光以消除机加工带来的表面缺陷.喷 涂前,对试样进行喷砂处理.在试样的平行标距处以及过 渡圆弧区域分别采用APS和HVOF工艺获得厚度约为 130 pm的Ni.25C卜5Al-_0.5Y涂层.喷涂设备和工艺参
MCrAlY涂层的高温氧化以及热腐蚀性能已经得到 了广泛的研究[5-7J.而在实际服役状态中,发动机的涡轮 叶片不仅受到变温下氧化和腐蚀作用,而且还受到交变的 机械载荷即热机械疲劳损伤,使得部件局部萌生裂纹,在 高温氧化条件下,加速了裂纹的扩展,严重降低了使用寿 命.因此,研究MCrAlY涂层试样的热机械疲劳行为有 很重要的意义.
Ni—Cr—Al—_Y have been investigated at 45m一900℃in air under mechanical strain control with a strain
ratio of一1 and a period of 200 S.The coating was produced either by air plasma spraying(APS) or by high velocity oxyfuel ruel(HVOF).It Was shown that under the same mechanical strain,the out of phase(OP)TMF 1ife is shorter than the in phase(IP)TMF one in both APS and HVOF coated specimens.The TMF life depends on the coating spraying technology under the same testing conditions.Observations of fracture surfaces and longitudinal sections revealed that crack initiation has great impact on the TMF life.
本文选用的基材为镍基高温合金M963,含有较高的 W,Mo和Nb等难熔的合金元素,具有良好的高温强 度和蠕变抗力.采用大气等离子(air plasma spraying, 简称APS)和高速火焰(high velocity oxyfuel fuel,简 称HVOF)2种工艺在加工好的基材试样表面喷涂Ni一 25Cr-5Al_0.5Y涂层,研究2种不同工艺制备的涂层 试样的热机械疲劳行为,比较两者之间疲劳寿命以及断 口形貌和裂纹扩展行为的差别,并对裂纹密度进行了统计 分析.
IMR,CAS(No.CIM09SJZHU) Manuscript received 2009-03—11.in revised form 200争批-10
ABSTRACT Gfits turbine engine is widely used in industry,marine and aerospace.Its emciency call be enhanced by increasing inlet gas temperature and reducing heat transfer.To achieve this goal it is important to develop materials with higher melting points.Ni—based superalloy is suitable for vane and blade materials.The properties of superalloy have been improved by directionally solidified and single crystal in last 50 yeal's.But it iS limited to develop superalloy with much higher temperature.because the operating temperature approaches the melting point of superalloy.In this rigorous environment, high temperature oxidation and hot corrosion impair the alloy property.MCrAlY coating is commonly used as oxidation-and corrosion-resistant material.Hitherto,it is clearly validated that the oxidat.ion— and corrosion—resistance of hot parts at high temperature can be greatly improved bv MCrAlY coating. The di仃brence of materials properties between』l彳CrAlY coating and superalloy may ca鹏e interactious which influence the mechanical properties and Iife of MCrAlY—coated component.A few of studies have conducted on mechanical properties of^彳CrAlY—coated superalloy.The results revealed that the present of coating affected the performance of superalloy.In service,thermo-mechanical fatigue provides a closer simulation of the actual strain—temperature in an engine environment.Only a few studies were published though their results were not consistency;because the experiment is hard to per- form and many factors influence the experiment results such as temperature--strain cycle shape,strain range magnitude,the ductility and the strength of the bond between the coating and the substrate.
数见文献18|. 疲劳实验均在计算机控制的热机械疲劳试验机
MTS810上进行,利用高频感应线圈进行加热,通过在 试样标距范围内点焊热电偶来实现温度控制,冷却方式为 压缩冷却空气吹向试样标距表面,并配合水冷液压夹头通 过热传导降温.采用机械应变控制的三角波加载,应变比 R=-I.应变控制通过轴向高温陶瓷引伸计实现,两支陶 瓷杆尖端距离为16 mm.实验采用同相位(IP,即最高 机械应变对应最高温度)和反相位(OP,最高机械应变对 应最低温度)波形.实验温度范围为450—900℃,周期 为200 S,采用的机械应变幅△£。。ch/2=o.5%,O.35%. 为了研究不同应变幅对涂层的损伤,对涂层中裂纹密度 (定义为断口以下10 mm纵剖面中单位长度平均裂纹数 目)进行统计.另外进行了0P下△E。。h/2=O.17%的 300 cyc中断实验(以此代替该应变幅下裂纹密度).
KEY WoRDS Ni—based superalloy,Ni—C卜.Al吖coating,thermo-mechanical fatigue.crack ini-
tiation and propagation
目前,燃气涡轮发动机已在工业、船舶和航空航天等 领域得到广泛应用.由于提高燃气进口温度可以提高工作 效率【川,近些年来,人们通过改进高温合金制备工艺使得 其性能得到很大改善,如用于一级涡轮叶片的镍基单晶高 温合金使用温度可达1100℃l21.在这样的高温条件下, 氧化、硫化、热腐蚀和外来颗粒的撞击都严重削弱合金的 性能.采用防护性涂层是有效的解决方法.MCrAlY涂 层因其具有抗高温氧化、抗热腐蚀、塑性以及成分可控等 优点,得到了广泛应用L3,4j.
BASED SUPERALLoY CoATED WITH Ni—Cr—Al-.Y
cHEN Zhubing.HUANG Zhiwei。Ⅵ,ANG Zhongguang Shenyang National Laboratory for Materials Science,Institute of Metal Research,Chinese Academy of Sciences,
ZHU Shijie Department of Intelligent Mechanical Engineering,Fukuoka Institute of Technology,Fukuoka,Japan Correspondent:毗4ⅣG Zhongguang,professor,弛f?(02j)8397ssw,E-maih zhgwang@imr.ac.cn SuppoSed by Center for Interracial MaterialsI Shenyang National Laboratory for Materials Science.
第45卷
第7期
2009年7月第820—-825页
金属学故
ACTA METALLURGICA SINICA
Vbl.45 NO.7 Jul.2009 PP.820-825
涂覆Ni—cr-Al—Y涂层的镍基高温合金热机械疲劳行为
陈竹兵 黄志伟 王中光
(中国科学院金属研究所沈阳材料科学国家(联合)实验室,沈阳110016)
+沈阳界面材料研究中心海外学者计划项目资助CIM09SJZHU
收到初稿日期:200叫13—11,收到修改稿日期:2009—04—10
作者简介:陈竹兵,男,1983年生,博士生
万方数据
第7期
陈竹兵等:涂覆Ni—C卜Al-Y涂层的镍基高温合金热机械疲劳行为821
In this paper,thermo-mechanical fatigue(TMF)behaviors of a Ni—based superalloy M963 coated with
朱世杰
(Department of Intelligent Mechanical Engineering,Fukuoka Institute of Technology,Fukuoka,Japan)
摘要 分别采取大气等离子(APS)和高速火焰(HVOF)工艺制备Ni--Cr—Al—_Y涂层.对涂覆Ni—C卜Al—Y涂层的高温 合金试样的热机械疲劳(TMF)行为进行了研究.结果表明:在相同应变幅下,2种涂层试样都是反相位热机械疲劳(OP TMF) 寿命比同相位热机械疲劳(IP TMF)寿命短;在不同应变幅下,试样的热机械疲劳寿命与涂层的喷涂工艺相关.通过断口和纵向剖
面图的观察分析表明,裂纹的萌生对试样的寿命有很大的影响.
关键词 镍基高温合金,Ni--Cr—A卜Y涂层,热机械疲劳,裂纹萌生与扩展 中图法分类号TGl46.15,V231.95 文献标识码A 文章编号0412-1961(2009)07—0820—06
THERMO—MECHANICAL FALTIGUE BEHAVIoR oF Ni—
1实ห้องสมุดไป่ตู้方法
M963合金的化学成分(质量分数,%)为:C 0.15, Cr 8.89,Al 6.00,Ti 2.55,Mo 1.64,W 10.1,Co 10.0, Nb 1.10,Zr 0.03,B 0.03,Ce 0.02,Y 0.01,Ni余量.实 验母合金采用真空感应炉重熔并浇铸成棒状试样,随后对 其进行1210"C/4 h+AC(空冷)的固溶处理.处理后的棒 材加工成标距直径为6 mm,标距长度为25 nlnl的试样, 并对试样进行机械抛光以消除机加工带来的表面缺陷.喷 涂前,对试样进行喷砂处理.在试样的平行标距处以及过 渡圆弧区域分别采用APS和HVOF工艺获得厚度约为 130 pm的Ni.25C卜5Al-_0.5Y涂层.喷涂设备和工艺参
MCrAlY涂层的高温氧化以及热腐蚀性能已经得到 了广泛的研究[5-7J.而在实际服役状态中,发动机的涡轮 叶片不仅受到变温下氧化和腐蚀作用,而且还受到交变的 机械载荷即热机械疲劳损伤,使得部件局部萌生裂纹,在 高温氧化条件下,加速了裂纹的扩展,严重降低了使用寿 命.因此,研究MCrAlY涂层试样的热机械疲劳行为有 很重要的意义.
Ni—Cr—Al—_Y have been investigated at 45m一900℃in air under mechanical strain control with a strain
ratio of一1 and a period of 200 S.The coating was produced either by air plasma spraying(APS) or by high velocity oxyfuel ruel(HVOF).It Was shown that under the same mechanical strain,the out of phase(OP)TMF 1ife is shorter than the in phase(IP)TMF one in both APS and HVOF coated specimens.The TMF life depends on the coating spraying technology under the same testing conditions.Observations of fracture surfaces and longitudinal sections revealed that crack initiation has great impact on the TMF life.
本文选用的基材为镍基高温合金M963,含有较高的 W,Mo和Nb等难熔的合金元素,具有良好的高温强 度和蠕变抗力.采用大气等离子(air plasma spraying, 简称APS)和高速火焰(high velocity oxyfuel fuel,简 称HVOF)2种工艺在加工好的基材试样表面喷涂Ni一 25Cr-5Al_0.5Y涂层,研究2种不同工艺制备的涂层 试样的热机械疲劳行为,比较两者之间疲劳寿命以及断 口形貌和裂纹扩展行为的差别,并对裂纹密度进行了统计 分析.
IMR,CAS(No.CIM09SJZHU) Manuscript received 2009-03—11.in revised form 200争批-10
ABSTRACT Gfits turbine engine is widely used in industry,marine and aerospace.Its emciency call be enhanced by increasing inlet gas temperature and reducing heat transfer.To achieve this goal it is important to develop materials with higher melting points.Ni—based superalloy is suitable for vane and blade materials.The properties of superalloy have been improved by directionally solidified and single crystal in last 50 yeal's.But it iS limited to develop superalloy with much higher temperature.because the operating temperature approaches the melting point of superalloy.In this rigorous environment, high temperature oxidation and hot corrosion impair the alloy property.MCrAlY coating is commonly used as oxidation-and corrosion-resistant material.Hitherto,it is clearly validated that the oxidat.ion— and corrosion—resistance of hot parts at high temperature can be greatly improved bv MCrAlY coating. The di仃brence of materials properties between』l彳CrAlY coating and superalloy may ca鹏e interactious which influence the mechanical properties and Iife of MCrAlY—coated component.A few of studies have conducted on mechanical properties of^彳CrAlY—coated superalloy.The results revealed that the present of coating affected the performance of superalloy.In service,thermo-mechanical fatigue provides a closer simulation of the actual strain—temperature in an engine environment.Only a few studies were published though their results were not consistency;because the experiment is hard to per- form and many factors influence the experiment results such as temperature--strain cycle shape,strain range magnitude,the ductility and the strength of the bond between the coating and the substrate.
数见文献18|. 疲劳实验均在计算机控制的热机械疲劳试验机
MTS810上进行,利用高频感应线圈进行加热,通过在 试样标距范围内点焊热电偶来实现温度控制,冷却方式为 压缩冷却空气吹向试样标距表面,并配合水冷液压夹头通 过热传导降温.采用机械应变控制的三角波加载,应变比 R=-I.应变控制通过轴向高温陶瓷引伸计实现,两支陶 瓷杆尖端距离为16 mm.实验采用同相位(IP,即最高 机械应变对应最高温度)和反相位(OP,最高机械应变对 应最低温度)波形.实验温度范围为450—900℃,周期 为200 S,采用的机械应变幅△£。。ch/2=o.5%,O.35%. 为了研究不同应变幅对涂层的损伤,对涂层中裂纹密度 (定义为断口以下10 mm纵剖面中单位长度平均裂纹数 目)进行统计.另外进行了0P下△E。。h/2=O.17%的 300 cyc中断实验(以此代替该应变幅下裂纹密度).
KEY WoRDS Ni—based superalloy,Ni—C卜.Al吖coating,thermo-mechanical fatigue.crack ini-
tiation and propagation
目前,燃气涡轮发动机已在工业、船舶和航空航天等 领域得到广泛应用.由于提高燃气进口温度可以提高工作 效率【川,近些年来,人们通过改进高温合金制备工艺使得 其性能得到很大改善,如用于一级涡轮叶片的镍基单晶高 温合金使用温度可达1100℃l21.在这样的高温条件下, 氧化、硫化、热腐蚀和外来颗粒的撞击都严重削弱合金的 性能.采用防护性涂层是有效的解决方法.MCrAlY涂 层因其具有抗高温氧化、抗热腐蚀、塑性以及成分可控等 优点,得到了广泛应用L3,4j.
BASED SUPERALLoY CoATED WITH Ni—Cr—Al-.Y
cHEN Zhubing.HUANG Zhiwei。Ⅵ,ANG Zhongguang Shenyang National Laboratory for Materials Science,Institute of Metal Research,Chinese Academy of Sciences,