title: Strengthening mechanisms of Ti via Al addition

authors: Bolzoni, Leandro

subjects: low-cost titanium alloy

abstract: Pure Ti is characterised by an interesting combination of performance from an engineering point of view. The addition of Al to Ti can be used to reduce the intrinsic cost of the material, decrease the density of the alloy, and increase the mechanical performance. This study is focused on evaluating the physical properties, microstructural evolution and mechanical behaviour of Ti-xAl alloys (where x = 1–6 wt%) in order to scientifically understand the strengthening mechanisms of the addition of Al to pure Ti manufactured via the conventional powder metallurgy route of cold uniaxial pressing plus solid state sintering. The addition of Al to Ti does not affect the compressibility of the alloy but changes the consolidation and densification of the alloy. The incremental addition of Al results in the progressive strengthening of Ti via the simultaneous contribution from substitutional solid solution and grain refinement strengthening which outdo the negative effect of the residual porosity.

text: Strengthening mechanisms of Ti via Al addition Pure Ti is characterised by an interesting combination of performance from an engineering point of view. The addition of Al to Ti can be used to reduce the intrinsic cost of the material, decrease the density of the alloy, and increase the mechanical performance. This study is focused on evaluating the physical properties, microstructural evolution and mechanical behaviour of Ti-xAl alloys (where x = 1–6 wt%) in order to scientifically understand the strengthening mechanisms of the addition of Al to pure Ti manufactured via the conventional powder metallurgy route of cold uniaxial pressing plus solid state sintering. The addition of Al to Ti does not affect the compressibility of the alloy but changes the consolidation and densification of the alloy. The incremental addition of Al results in the progressive strengthening of Ti via the simultaneous contribution from substitutional solid solution and grain refinement strengthening which outdo the negative effect of the residual porosity.

year: 2020

title: Dissecting action sports studies: Past, present, and beyond

authors: Thorpe, Holly Aysha

subjects: POLITICAL SCIENCE

abstract: The term “action sports” broadly refers to a wide range of mostly individualized activities such as BMX, kite-surfing, skateboarding, surfing, and snowboarding that differed – at least in their early phases of development – from traditional rule-bound, competitive, regulated Western “achievement” sport cultures ( Booth and Thorpe, 2007 ; Kusz, 2007a ; Wheaton 2004, 2010 ). Various categorizations have been used to describe these activities, including extreme, lifestyle, and alternative sports. In this chapter, however, the term action sports is used as it is currently the preferred term among committed participants and industry members in North America and Australasia (many of whom reject the overly commercialized “extreme” moniker imposed upon them by transnational media and mainstream sponsors during the mid- and late 1990s).
Many action sports gained popularity during the new leisure trends of the 1960s and 1970s and increasingly attracted alternative youth, who appropriated these activities and infused them with a set of hedonistic and carefree philosophies and subcultural styles ( Booth and Thorpe, 2007 ;  Thorpe and Wheaton, 2011a ; Wheaton, 2010 ).

text: Dissecting action sports studies: Past, present, and beyond The term “action sports” broadly refers to a wide range of mostly individualized activities such as BMX, kite-surfing, skateboarding, surfing, and snowboarding that differed – at least in their early phases of development – from traditional rule-bound, competitive, regulated Western “achievement” sport cultures ( Booth and Thorpe, 2007 ; Kusz, 2007a ; Wheaton 2004, 2010 ). Various categorizations have been used to describe these activities, including extreme, lifestyle, and alternative sports. In this chapter, however, the term action sports is used as it is currently the preferred term among committed participants and industry members in North America and Australasia (many of whom reject the overly commercialized “extreme” moniker imposed upon them by transnational media and mainstream sponsors during the mid- and late 1990s).
Many action sports gained popularity during the new leisure trends of the 1960s and 1970s and increasingly attracted alternative youth, who appropriated these activities and infused them with a set of hedonistic and carefree philosophies and subcultural styles ( Booth and Thorpe, 2007 ;  Thorpe and Wheaton, 2011a ; Wheaton, 2010 ).

year: 2013

title: Section 2: Native disruption: Maori and the precariat: Introduction

authors: Masters-Awatere, Bridgette

abstract: Within this section, the authors encourage the reader to look back into history and then consider the future. We are invited to re-examine deeds from this country’s past. To immerse ourselves in a narrative that may be different to the one we have been taught in school, or heard among our friends and family. Through their stories we can see multiple narratives. Readers are invited to understand, embrace and own the past. By recognising and accepting the past — our collective histories — we can determine our collective present and future.

text: Section 2: Native disruption: Maori and the precariat: Introduction Within this section, the authors encourage the reader to look back into history and then consider the future. We are invited to re-examine deeds from this country’s past. To immerse ourselves in a narrative that may be different to the one we have been taught in school, or heard among our friends and family. Through their stories we can see multiple narratives. Readers are invited to understand, embrace and own the past. By recognising and accepting the past — our collective histories — we can determine our collective present and future.

year: 2017